20873900 has 18 divisors (see below), whose sum is σ = 45296580. Its totient is φ = 8349520.

The previous prime is 20873899. The next prime is 20873953. The reversal of 20873900 is 937802.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 104270 + ... + 104469.

Almost surely, 2^20873900 is an apocalyptic number.

20873900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20873900 is an abundant number, since it is smaller than the sum of its proper divisors (24422680).

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

20873900 is a wasteful number, since it uses less digits than its factorization.

20873900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208753 (or 208746 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 20873900 is about 4568.7963403943. The cubic root of 20873900 is about 275.3390858541.

The spelling of 20873900 in words is "twenty million, eight hundred seventy-three thousand, nine hundred".