22609223921 has 2 divisors, whose sum is σ = 22609223922. Its totient is φ = 22609223920.

The previous prime is 22609223909. The next prime is 22609223927. The reversal of 22609223921 is 12932290622.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21502996321 + 1106227600 = 146639^2 + 33260^2 .

It is a cyclic number.

It is not a de Polignac number, because 22609223921 - 2³⁴ = 5429354737 is a prime.

It is a super-2 number, since 2×22609223921² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22609223927) 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 as a sum of consecutive naturals, namely, 11304611960 + 11304611961.

It is an arithmetic number, because the mean of its divisors is an integer number (11304611961).

Almost surely, 2^22609223921 is an apocalyptic number.

It is an amenable number.

22609223921 is a deficient number, since it is larger than the sum of its proper divisors (1).

22609223921 is an equidigital number, since it uses as much as digits as its factorization.

22609223921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 38.

The spelling of 22609223921 in words is "twenty-two billion, six hundred nine million, two hundred twenty-three thousand, nine hundred twenty-one".