23687391338 has 32 divisors (see below), whose sum is σ = 40417208832. Its totient is φ = 10333915200.

The previous prime is 23687391263. The next prime is 23687391347. The reversal of 23687391338 is 83319378632.

It is a super-2 number, since 2×23687391338² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 23687391338.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 307073 + ... + 376388.

It is an arithmetic number, because the mean of its divisors is an integer number (1263037776).

Almost surely, 2^23687391338 is an apocalyptic number.

23687391338 is a deficient number, since it is larger than the sum of its proper divisors (16729817494).

23687391338 is a wasteful number, since it uses less digits than its factorization.

23687391338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683550.

The product of its digits is 3919104, while the sum is 53.

The spelling of 23687391338 in words is "twenty-three billion, six hundred eighty-seven million, three hundred ninety-one thousand, three hundred thirty-eight".