20972116563 has 8 divisors (see below), whose sum is σ = 28613120448. Its totient is φ = 13656261864.

The previous prime is 20972116553. The next prime is 20972116573. The reversal of 20972116563 is 36561127902.

It is an interprime number because it is at equal distance from previous prime (20972116553) and next prime (20972116573).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20972116563 - 2⁵ = 20972116531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20972116553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81287145 + ... + 81287402.

It is an arithmetic number, because the mean of its divisors is an integer number (3576640056).

Almost surely, 2^20972116563 is an apocalyptic number.

20972116563 is a deficient number, since it is larger than the sum of its proper divisors (7641003885).

20972116563 is a wasteful number, since it uses less digits than its factorization.

20972116563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162574593.

The product of its (nonzero) digits is 136080, while the sum is 42.

The spelling of 20972116563 in words is "twenty billion, nine hundred seventy-two million, one hundred sixteen thousand, five hundred sixty-three".