20056900 has 18 divisors (see below), whose sum is σ = 43523690. Its totient is φ = 8022720.

The previous prime is 20056891. The next prime is 20056903. The reversal of 20056900 is 965002.

It can be written as a sum of positive squares in 3 ways, for example, as 147456 + 19909444 = 384^2 + 4462^2 .

It is a super-2 number, since 2×20056900² = 804558475220000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20056903) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 100185 + ... + 100384.

Almost surely, 2^20056900 is an apocalyptic number.

20056900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20056900 is an abundant number, since it is smaller than the sum of its proper divisors (23466790).

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

20056900 is a wasteful number, since it uses less digits than its factorization.

20056900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200583 (or 200576 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 20056900 is about 4478.4930501230. The cubic root of 20056900 is about 271.6989351979.

The spelling of 20056900 in words is "twenty million, fifty-six thousand, nine hundred".