18087464 has 16 divisors (see below), whose sum is σ = 34019700. Its totient is φ = 9015552.

The previous prime is 18087457. The next prime is 18087479. The reversal of 18087464 is 46478081.

It can be written as a sum of positive squares in 2 ways, for example, as 18062500 + 24964 = 4250^2 + 158^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 659 + ... + 6050.

Almost surely, 2^18087464 is an apocalyptic number.

It is an amenable number.

18087464 is a deficient number, since it is larger than the sum of its proper divisors (15932236).

18087464 is a wasteful number, since it uses less digits than its factorization.

18087464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7052 (or 7048 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 18087464 is about 4252.9359270979. The cubic root of 18087464 is about 262.4979361894.

The spelling of 18087464 in words is "eighteen million, eighty-seven thousand, four hundred sixty-four".