18312137660 has 24 divisors (see below), whose sum is σ = 38562622560. Its totient is φ = 7304448704.

The previous prime is 18312137659. The next prime is 18312137671. The reversal of 18312137660 is 6673121381.

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, 1268039 + ... + 1282398.

It is an arithmetic number, because the mean of its divisors is an integer number (1606775940).

Almost surely, 2^18312137660 is an apocalyptic number.

18312137660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18312137660 is an abundant number, since it is smaller than the sum of its proper divisors (20250484900).

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

18312137660 is a wasteful number, since it uses less digits than its factorization.

18312137660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2550805 (or 2550803 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 38.

The spelling of 18312137660 in words is "eighteen billion, three hundred twelve million, one hundred thirty-seven thousand, six hundred sixty".