18312105632 has 24 divisors (see below), whose sum is σ = 36060345216. Its totient is φ = 9153922752.

The previous prime is 18312105619. The next prime is 18312105659. The reversal of 18312105632 is 23650121381.

It is a super-2 number, since 2×18312105632² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77963 + ... + 206645.

It is an arithmetic number, because the mean of its divisors is an integer number (1502514384).

Almost surely, 2^18312105632 is an apocalyptic number.

It is an amenable number.

18312105632 is a deficient number, since it is larger than the sum of its proper divisors (17748239584).

18312105632 is a wasteful number, since it uses less digits than its factorization.

18312105632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133140 (or 133132 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The spelling of 18312105632 in words is "eighteen billion, three hundred twelve million, one hundred five thousand, six hundred thirty-two".