20544900 has 36 divisors (see below), whose sum is σ = 59444112. Its totient is φ = 5478560.

The previous prime is 20544899. The next prime is 20544929. The reversal of 20544900 is 944502.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33942 + ... + 34541.

Almost surely, 2^20544900 is an apocalyptic number.

20544900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20544900 is an abundant number, since it is smaller than the sum of its proper divisors (38899212).

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

20544900 is a wasteful number, since it uses less digits than its factorization.

20544900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68500 (or 68493 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 20544900 is about 4532.6482325457. The cubic root of 20544900 is about 273.8848504728.

The spelling of 20544900 in words is "twenty million, five hundred forty-four thousand, nine hundred".