20104090057 has 4 divisors (see below), whose sum is σ = 21162200080. Its totient is φ = 19045980036.

The previous prime is 20104090031. The next prime is 20104090063. The reversal of 20104090057 is 75009040102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20104090057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20104090157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 529054983 + ... + 529055020.

It is an arithmetic number, because the mean of its divisors is an integer number (5290550020).

Almost surely, 2^20104090057 is an apocalyptic number.

It is an amenable number.

20104090057 is a deficient number, since it is larger than the sum of its proper divisors (1058110023).

20104090057 is a wasteful number, since it uses less digits than its factorization.

20104090057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1058110022.

The product of its (nonzero) digits is 2520, while the sum is 28.

The spelling of 20104090057 in words is "twenty billion, one hundred four million, ninety thousand, fifty-seven".