20126 has 8 divisors (see below), whose sum is σ = 31320. Its totient is φ = 9688.

The previous prime is 20123. The next prime is 20129. The reversal of 20126 is 62102.

It is an interprime number because it is at equal distance from previous prime (20123) and next prime (20129).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number *n* which divided by its sum of digits gives 20126.

It is not an unprimeable number, because it can be changed into a prime (20123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116 + ... + 231.

It is an arithmetic number, because the mean of its divisors is an integer number (3915).

2^{20126} is an apocalyptic number.

20126 is the 116-th pentagonal number.

20126 is a deficient number, since it is larger than the sum of its proper divisors (11194).

20126 is a wasteful number, since it uses less digits than its factorization.

20126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 20126 is about 141.8661340842. The cubic root of 20126 is about 27.2010596473.

Subtracting from 20126 its product of nonzero digits (24), we obtain a palindrome (20102).

Adding to 20126 its reverse (62102), we get a palindrome (82228).

The spelling of 20126 in words is "twenty thousand, one hundred twenty-six".

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