18312586464 has 24 divisors (see below), whose sum is σ = 48070539720. Its totient is φ = 6104195456.

The previous prime is 18312586459. The next prime is 18312586469. The reversal of 18312586464 is 46468521381.

It is an interprime number because it is at equal distance from previous prime (18312586459) and next prime (18312586469).

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18312586469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95377959 + ... + 95378150.

It is an arithmetic number, because the mean of its divisors is an integer number (2002939155).

Almost surely, 2^18312586464 is an apocalyptic number.

It is an amenable number.

18312586464 is an abundant number, since it is smaller than the sum of its proper divisors (29757953256).

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

18312586464 is a wasteful number, since it uses less digits than its factorization.

18312586464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190756122 (or 190756114 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 48.

The spelling of 18312586464 in words is "eighteen billion, three hundred twelve million, five hundred eighty-six thousand, four hundred sixty-four".