20572770317 has 32 divisors (see below), whose sum is σ = 23801057280. Its totient is φ = 17604861120.

The previous prime is 20572770313. The next prime is 20572770319. The reversal of 20572770317 is 71307727502.

It is a happy number.

It is not a de Polignac number, because 20572770317 - 2² = 20572770313 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20572770313) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9971228 + ... + 9973290.

It is an arithmetic number, because the mean of its divisors is an integer number (743783040).

Almost surely, 2^20572770317 is an apocalyptic number.

It is an amenable number.

20572770317 is a deficient number, since it is larger than the sum of its proper divisors (3228286963).

20572770317 is a wasteful number, since it uses less digits than its factorization.

20572770317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2873.

The product of its (nonzero) digits is 144060, while the sum is 41.

The spelling of 20572770317 in words is "twenty billion, five hundred seventy-two million, seven hundred seventy thousand, three hundred seventeen".