20936900 has 36 divisors (see below), whose sum is σ = 47413632. Its totient is φ = 8009760.

The previous prime is 20936893. The next prime is 20936921. The reversal of 20936900 is 963902.

It is a super-3 number, since 3×20936900³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2252 + ... + 6851.

Almost surely, 2^20936900 is an apocalyptic number.

20936900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20936900 is an abundant number, since it is smaller than the sum of its proper divisors (26476732).

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

20936900 is a wasteful number, since it uses less digits than its factorization.

20936900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9140 (or 9133 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 20936900 is about 4575.6857409573. The cubic root of 20936900 is about 275.6158100641.

The spelling of 20936900 in words is "twenty million, nine hundred thirty-six thousand, nine hundred".