22979719421 has 4 divisors (see below), whose sum is σ = 23294510172. Its totient is φ = 22664928672.

The previous prime is 22979719391. The next prime is 22979719457. The reversal of 22979719421 is 12491797922.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17460715321 + 5519004100 = 132139^2 + 74290^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22979719421 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 (22979712421) 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, 157395266 + ... + 157395411.

It is an arithmetic number, because the mean of its divisors is an integer number (5823627543).

Almost surely, 2^22979719421 is an apocalyptic number.

It is an amenable number.

22979719421 is a deficient number, since it is larger than the sum of its proper divisors (314790751).

22979719421 is an equidigital number, since it uses as much as digits as its factorization.

22979719421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314790750.

The product of its digits is 1143072, while the sum is 53.

The spelling of 22979719421 in words is "twenty-two billion, nine hundred seventy-nine million, seven hundred nineteen thousand, four hundred twenty-one".