20013176207257 has 4 divisors (see below), whose sum is σ = 20013815249280. Its totient is φ = 20012537165236.

The previous prime is 20013176207249. The next prime is 20013176207291. The reversal of 20013176207257 is 75270267131002.

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 not a de Polignac number, because 20013176207257 - 2³ = 20013176207249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20013176205257) 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, 319474033 + ... + 319536670.

It is an arithmetic number, because the mean of its divisors is an integer number (5003453812320).

Almost surely, 2^{20013176207257} is an apocalyptic number.

It is an amenable number.

20013176207257 is a deficient number, since it is larger than the sum of its proper divisors (639042023).

20013176207257 is an equidigital number, since it uses as much as digits as its factorization.

20013176207257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639042022.

The product of its (nonzero) digits is 246960, while the sum is 43.

The spelling of 20013176207257 in words is "twenty trillion, thirteen billion, one hundred seventy-six million, two hundred seven thousand, two hundred fifty-seven".