20898504 has 48 divisors (see below), whose sum is σ = 61747920. Its totient is φ = 6332640.

The previous prime is 20898481. The next prime is 20898529. The reversal of 20898504 is 40589802.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 12402 + ... + 13985.

It is an arithmetic number, because the mean of its divisors is an integer number (1286415).

Almost surely, 2^20898504 is an apocalyptic number.

20898504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20898504 is an abundant number, since it is smaller than the sum of its proper divisors (40849416).

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

20898504 is a wasteful number, since it uses less digits than its factorization.

20898504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26410 (or 26403 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 20898504 is about 4571.4881603259. The cubic root of 20898504 is about 275.4472238149.

The spelling of 20898504 in words is "twenty million, eight hundred ninety-eight thousand, five hundred four".