20444900 has 36 divisors (see below), whose sum is σ = 50705088. Its totient is φ = 7009440.

The previous prime is 20444887. The next prime is 20444911. The reversal of 20444900 is 944402.

It is a happy number.

It is a congruent number.

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, 13904 + ... + 15303.

Almost surely, 2^20444900 is an apocalyptic number.

20444900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20444900 is an abundant number, since it is smaller than the sum of its proper divisors (30260188).

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

20444900 is a wasteful number, since it uses less digits than its factorization.

20444900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29228 (or 29221 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 20444900 is about 4521.6036978046. The cubic root of 20444900 is about 273.4397596004.

The spelling of 20444900 in words is "twenty million, four hundred forty-four thousand, nine hundred".