23902431 has 16 divisors (see below), whose sum is σ = 36672000. Its totient is φ = 13565088.

The previous prime is 23902429. The next prime is 23902433. The reversal of 23902431 is 13420932.

It is an interprime number because it is at equal distance from previous prime (23902429) and next prime (23902433).

It is not a de Polignac number, because 23902431 - 2¹ = 23902429 is a prime.

It is a super-2 number, since 2×23902431² = 1142652415419522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23902433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 691 + ... + 6948.

It is an arithmetic number, because the mean of its divisors is an integer number (2292000).

Almost surely, 2^23902431 is an apocalyptic number.

23902431 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

23902431 is a deficient number, since it is larger than the sum of its proper divisors (12769569).

23902431 is a wasteful number, since it uses less digits than its factorization.

23902431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7798.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 23902431 is about 4889.0112497314. The cubic root of 23902431 is about 288.0584974731.

The spelling of 23902431 in words is "twenty-three million, nine hundred two thousand, four hundred thirty-one".