20057408 has 28 divisors (see below), whose sum is σ = 45488352. Its totient is φ = 8595840.

The previous prime is 20057383. The next prime is 20057431. The reversal of 20057408 is 80475002.

It is a tau number, because it is divible by the number of its divisors (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21938 + ... + 22833.

It is an arithmetic number, because the mean of its divisors is an integer number (1624584).

Almost surely, 2^20057408 is an apocalyptic number.

20057408 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20057408 is an abundant number, since it is smaller than the sum of its proper divisors (25430944).

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

20057408 is an equidigital number, since it uses as much as digits as its factorization.

20057408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44790 (or 44780 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 20057408 is about 4478.5497652700. The cubic root of 20057408 is about 271.7012290368.

The spelling of 20057408 in words is "twenty million, fifty-seven thousand, four hundred eight".