20404600 has 24 divisors (see below), whose sum is σ = 47441160. Its totient is φ = 8161760.

The previous prime is 20404591. The next prime is 20404679. The reversal of 20404600 is 640402.

It is a congruent number.

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, 50812 + ... + 51211.

It is an arithmetic number, because the mean of its divisors is an integer number (1976715).

Almost surely, 2^20404600 is an apocalyptic number.

20404600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20404600 is an abundant number, since it is smaller than the sum of its proper divisors (27036560).

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

20404600 is a wasteful number, since it uses less digits than its factorization.

20404600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102039 (or 102030 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 20404600 is about 4517.1451161104. The cubic root of 20404600 is about 273.2599776711.

The spelling of 20404600 in words is "twenty million, four hundred four thousand, six hundred".