23426840872638 has 96 divisors (see below), whose sum is σ = 58198434228480. Its totient is φ = 6671571920640.

The previous prime is 23426840872621. The next prime is 23426840872639. The reversal of 23426840872638 is 83627804862432.

23426840872638 is a `hidden beast` number, since 2 + 3 + 42 + 68 + 408 + 72 + 63 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23426840872639) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 180897606 + ... + 181027062.

It is an arithmetic number, because the mean of its divisors is an integer number (606233689880).

Almost surely, 2^{23426840872638} is an apocalyptic number.

23426840872638 is an abundant number, since it is smaller than the sum of its proper divisors (34771593355842).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23426840872638 is a wasteful number, since it uses less digits than its factorization.

23426840872638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134142 (or 134139 counting only the distinct ones).

The product of its (nonzero) digits is 148635648, while the sum is 63.

The spelling of 23426840872638 in words is "twenty-three trillion, four hundred twenty-six billion, eight hundred forty million, eight hundred seventy-two thousand, six hundred thirty-eight".