18853868 has 36 divisors (see below), whose sum is σ = 37111032. Its totient is φ = 8311680.

The previous prime is 18853847. The next prime is 18853873. The reversal of 18853868 is 86835881.

It is a super-2 number, since 2×18853868² = 710936677122848, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60080 + ... + 60392.

It is an arithmetic number, because the mean of its divisors is an integer number (1030862).

Almost surely, 2^18853868 is an apocalyptic number.

It is an amenable number.

18853868 is a deficient number, since it is larger than the sum of its proper divisors (18257164).

18853868 is a wasteful number, since it uses less digits than its factorization.

18853868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402 (or 363 counting only the distinct ones).

The product of its digits is 368640, while the sum is 47.

The square root of 18853868 is about 4342.1040982455. The cubic root of 18853868 is about 266.1543002106.

The spelling of 18853868 in words is "eighteen million, eight hundred fifty-three thousand, eight hundred sixty-eight".