20252980961 has 4 divisors (see below), whose sum is σ = 20398686000. Its totient is φ = 20107275924.

The previous prime is 20252980939. The next prime is 20252980997. The reversal of 20252980961 is 16908925202.

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-20252980961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20252980921) 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, 72852311 + ... + 72852588.

It is an arithmetic number, because the mean of its divisors is an integer number (5099671500).

Almost surely, 2^20252980961 is an apocalyptic number.

It is an amenable number.

20252980961 is a deficient number, since it is larger than the sum of its proper divisors (145705039).

20252980961 is a wasteful number, since it uses less digits than its factorization.

20252980961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145705038.

The product of its (nonzero) digits is 155520, while the sum is 44.

The spelling of 20252980961 in words is "twenty billion, two hundred fifty-two million, nine hundred eighty thousand, nine hundred sixty-one".