18748864 has 56 divisors (see below), whose sum is σ = 39794688. Its totient is φ = 8743680.

The previous prime is 18748859. The next prime is 18748871. The reversal of 18748864 is 46884781.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (46).

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, 69049 + ... + 69319.

Almost surely, 2^18748864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18748864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19897344).

18748864 is an abundant number, since it is smaller than the sum of its proper divisors (21045824).

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

18748864 is a wasteful number, since it uses less digits than its factorization.

18748864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353 (or 343 counting only the distinct ones).

The product of its digits is 344064, while the sum is 46.

The square root of 18748864 is about 4329.9958429541. The cubic root of 18748864 is about 265.6592769423.

The spelling of 18748864 in words is "eighteen million, seven hundred forty-eight thousand, eight hundred sixty-four".