22972421797 has 18 divisors (see below), whose sum is σ = 25011427014. Its totient is φ = 20974781520.

The previous prime is 22972421783. The next prime is 22972421803. The reversal of 22972421797 is 79712427922.

It can be written as a sum of positive squares in only one way, i.e., 15903984321 + 7068437476 = 126111^2 + 84074^2 .

It is not a de Polignac number, because 22972421797 - 2²³ = 22964033189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22972421737) by changing a digit.

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 17 ways as a sum of consecutive naturals, for example, 69402922 + ... + 69403252.

It is an arithmetic number, because the mean of its divisors is an integer number (1389523723).

Almost surely, 2^22972421797 is an apocalyptic number.

It is an amenable number.

22972421797 is a deficient number, since it is larger than the sum of its proper divisors (2039005217).

22972421797 is an frugal number, since it uses more digits than its factorization.

22972421797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929 (or 471 counting only the distinct ones).

The product of its digits is 1778112, while the sum is 52.

Multiplying 22972421797 by its sum of digits (52), we get a square (1194565933444 = 1092962²).

The spelling of 22972421797 in words is "twenty-two billion, nine hundred seventy-two million, four hundred twenty-one thousand, seven hundred ninety-seven".