18713823864 has 32 divisors (see below), whose sum is σ = 47443501440. Its totient is φ = 6150082400.

The previous prime is 18713823833. The next prime is 18713823871. The reversal of 18713823864 is 46832831781.

It is a super-2 number, since 2×18713823864² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5489442 + ... + 5492849.

It is an arithmetic number, because the mean of its divisors is an integer number (1482609420).

Almost surely, 2^18713823864 is an apocalyptic number.

It is an amenable number.

18713823864 is an abundant number, since it is smaller than the sum of its proper divisors (28729677576).

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

18713823864 is a wasteful number, since it uses less digits than its factorization.

18713823864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10982371 (or 10982367 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 51.

The spelling of 18713823864 in words is "eighteen billion, seven hundred thirteen million, eight hundred twenty-three thousand, eight hundred sixty-four".