23027872138 has 32 divisors (see below), whose sum is σ = 37809691920. Its totient is φ = 10475274240.

The previous prime is 23027872129. The next prime is 23027872139. The reversal of 23027872138 is 83127872032.

It can be written as a sum of positive squares in 8 ways, for example, as 12142497249 + 10885374889 = 110193^2 + 104333^2 .

It is a junction number, because it is equal to n+sod(n) for n = 23027872094 and 23027872103.

It is not an unprimeable number, because it can be changed into a prime (23027872139) 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, 76170 + ... + 227722.

Almost surely, 2^23027872138 is an apocalyptic number.

23027872138 is a deficient number, since it is larger than the sum of its proper divisors (14781819782).

23027872138 is a wasteful number, since it uses less digits than its factorization.

23027872138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151722.

The product of its (nonzero) digits is 225792, while the sum is 43.

The spelling of 23027872138 in words is "twenty-three billion, twenty-seven million, eight hundred seventy-two thousand, one hundred thirty-eight".