20973215975 has 12 divisors (see below), whose sum is σ = 26709675144. Its totient is φ = 16325097120.

The previous prime is 20973215951. The next prime is 20973216029. The reversal of 20973215975 is 57951237902.

It is not a de Polignac number, because 20973215975 - 2⁸ = 20973215719 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11335949 + ... + 11337798.

It is an arithmetic number, because the mean of its divisors is an integer number (2225806262).

Almost surely, 2^20973215975 is an apocalyptic number.

20973215975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20973215975 is a deficient number, since it is larger than the sum of its proper divisors (5736459169).

20973215975 is a wasteful number, since it uses less digits than its factorization.

20973215975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22673794 (or 22673789 counting only the distinct ones).

The product of its (nonzero) digits is 1190700, while the sum is 50.

The spelling of 20973215975 in words is "twenty billion, nine hundred seventy-three million, two hundred fifteen thousand, nine hundred seventy-five".