22604565421 has 2 divisors, whose sum is σ = 22604565422. Its totient is φ = 22604565420.

The previous prime is 22604565407. The next prime is 22604565427. The reversal of 22604565421 is 12456540622.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21516489225 + 1088076196 = 146685^2 + 32986^2 .

It is a cyclic number.

It is not a de Polignac number, because 22604565421 - 2¹⁹ = 22604041133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22604565427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11302282710 + 11302282711.

It is an arithmetic number, because the mean of its divisors is an integer number (11302282711).

Almost surely, 2^22604565421 is an apocalyptic number.

It is an amenable number.

22604565421 is a deficient number, since it is larger than the sum of its proper divisors (1).

22604565421 is an equidigital number, since it uses as much as digits as its factorization.

22604565421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 115200, while the sum is 37.

It can be divided in two parts, 226045 and 65421, that added together give a triangular number (291466 = T₇₆₃).

The spelling of 22604565421 in words is "twenty-two billion, six hundred four million, five hundred sixty-five thousand, four hundred twenty-one".