18367085864 has 32 divisors (see below), whose sum is σ = 35461155240. Its totient is φ = 8913100800.

The previous prime is 18367085857. The next prime is 18367085903. The reversal of 18367085864 is 46858076381.

It can be written as a sum of positive squares in 4 ways, for example, as 6945888964 + 11421196900 = 83342^2 + 106870^2 .

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, 81767 + ... + 208374.

Almost surely, 2^18367085864 is an apocalyptic number.

It is an amenable number.

18367085864 is a deficient number, since it is larger than the sum of its proper divisors (17094069376).

18367085864 is a wasteful number, since it uses less digits than its factorization.

18367085864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290381 (or 290377 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 56.

The spelling of 18367085864 in words is "eighteen billion, three hundred sixty-seven million, eighty-five thousand, eight hundred sixty-four".