18748868 has 6 divisors (see below), whose sum is σ = 32810526. Its totient is φ = 9374432.

The previous prime is 18748859. The next prime is 18748871. The reversal of 18748868 is 86884781.

It can be written as a sum of positive squares in only one way, i.e., 15429184 + 3319684 = 3928^2 + 1822^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2343605 + ... + 2343612.

It is an arithmetic number, because the mean of its divisors is an integer number (5468421).

Almost surely, 2^18748868 is an apocalyptic number.

It is an amenable number.

18748868 is a deficient number, since it is larger than the sum of its proper divisors (14061658).

18748868 is a wasteful number, since it uses less digits than its factorization.

18748868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4687221 (or 4687219 counting only the distinct ones).

The product of its digits is 688128, while the sum is 50.

The square root of 18748868 is about 4329.9963048483. The cubic root of 18748868 is about 265.6592958347.

The spelling of 18748868 in words is "eighteen million, seven hundred forty-eight thousand, eight hundred sixty-eight".