20080557 has 36 divisors (see below), whose sum is σ = 34421920. Its totient is φ = 11049696.

The previous prime is 20080537. The next prime is 20080573. The reversal of 20080557 is 75508002.

It is a happy number.

It is not a de Polignac number, because 20080557 - 2⁷ = 20080429 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20080557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20080537) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 52794 + ... + 53172.

Almost surely, 2^20080557 is an apocalyptic number.

It is an amenable number.

20080557 is a deficient number, since it is larger than the sum of its proper divisors (14341363).

20080557 is a wasteful number, since it uses less digits than its factorization.

20080557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450 (or 418 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 20080557 is about 4481.1334503672. The cubic root of 20080557 is about 271.8057156785.

Adding to 20080557 its reverse (75508002), we get a palindrome (95588559).

The spelling of 20080557 in words is "twenty million, eighty thousand, five hundred fifty-seven".