18862868 has 6 divisors (see below), whose sum is σ = 33010026. Its totient is φ = 9431432.

The previous prime is 18862819. The next prime is 18862871. The reversal of 18862868 is 86826881.

It can be written as a sum of positive squares in only one way, i.e., 18679684 + 183184 = 4322^2 + 428^2 .

It is a congruent number.

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 as a sum of consecutive naturals, namely, 2357855 + ... + 2357862.

It is an arithmetic number, because the mean of its divisors is an integer number (5501671).

Almost surely, 2^18862868 is an apocalyptic number.

It is an amenable number.

18862868 is a deficient number, since it is larger than the sum of its proper divisors (14147158).

18862868 is a wasteful number, since it uses less digits than its factorization.

18862868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4715721 (or 4715719 counting only the distinct ones).

The product of its digits is 294912, while the sum is 47.

The square root of 18862868 is about 4343.1403385108. The cubic root of 18862868 is about 266.1966435581.

The spelling of 18862868 in words is "eighteen million, eight hundred sixty-two thousand, eight hundred sixty-eight".