18718464 has 36 divisors (see below), whose sum is σ = 49820456. Its totient is φ = 6239232.

The previous prime is 18718463. The next prime is 18718489. The reversal of 18718464 is 46481781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18718463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11419 + ... + 12954.

Almost surely, 2^18718464 is an apocalyptic number.

It is an amenable number.

18718464 is an abundant number, since it is smaller than the sum of its proper divisors (31101992).

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

18718464 is an equidigital number, since it uses as much as digits as its factorization.

18718464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24392 (or 24378 counting only the distinct ones).

The product of its digits is 43008, while the sum is 39.

The square root of 18718464 is about 4326.4840228527. The cubic root of 18718464 is about 265.5156164895.

The spelling of 18718464 in words is "eighteen million, seven hundred eighteen thousand, four hundred sixty-four".