18936885 has 16 divisors (see below), whose sum is σ = 33053760. Its totient is φ = 9181440.

The previous prime is 18936829. The next prime is 18936893. The reversal of 18936885 is 58863981.

It is not a de Polignac number, because 18936885 - 2⁶ = 18936821 is a prime.

It is a super-2 number, since 2×18936885² = 717211227006450, 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 (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57220 + ... + 57549.

It is an arithmetic number, because the mean of its divisors is an integer number (2065860).

Almost surely, 2^18936885 is an apocalyptic number.

18936885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18936885 is a deficient number, since it is larger than the sum of its proper divisors (14116875).

18936885 is a wasteful number, since it uses less digits than its factorization.

18936885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114788.

The product of its digits is 414720, while the sum is 48.

The square root of 18936885 is about 4351.6531341549. The cubic root of 18936885 is about 266.5443701372.

It can be divided in two parts, 1893 and 6885, that added together give a palindrome (8778).

The spelling of 18936885 in words is "eighteen million, nine hundred thirty-six thousand, eight hundred eighty-five".