23691569138 has 16 divisors (see below), whose sum is σ = 37979453664. Its totient is φ = 11044776000.

The previous prime is 23691569137. The next prime is 23691569149. The reversal of 23691569138 is 83196519632.

It is a super-2 number, since 2×23691569138² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23691569138.

It is not an unprimeable number, because it can be changed into a prime (23691569137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3252488 + ... + 3259763.

It is an arithmetic number, because the mean of its divisors is an integer number (2373715854).

Almost surely, 2^23691569138 is an apocalyptic number.

23691569138 is a deficient number, since it is larger than the sum of its proper divisors (14287884526).

23691569138 is a wasteful number, since it uses less digits than its factorization.

23691569138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6512377.

The product of its digits is 2099520, while the sum is 53.

The spelling of 23691569138 in words is "twenty-three billion, six hundred ninety-one million, five hundred sixty-nine thousand, one hundred thirty-eight".