20457080 has 32 divisors (see below), whose sum is σ = 52604640. Its totient is φ = 7013760.

The previous prime is 20457067. The next prime is 20457119. The reversal of 20457080 is 8075402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36251 + ... + 36810.

It is an arithmetic number, because the mean of its divisors is an integer number (1643895).

Almost surely, 2^20457080 is an apocalyptic number.

20457080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20457080 is an abundant number, since it is smaller than the sum of its proper divisors (32147560).

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

20457080 is a wasteful number, since it uses less digits than its factorization.

20457080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73079 (or 73075 counting only the distinct ones).

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

The square root of 20457080 is about 4522.9503645298. The cubic root of 20457080 is about 273.4940491805.

The spelling of 20457080 in words is "twenty million, four hundred fifty-seven thousand, eighty".