22405898621 has 2 divisors, whose sum is σ = 22405898622. Its totient is φ = 22405898620.

The previous prime is 22405898549. The next prime is 22405898633. The reversal of 22405898621 is 12689850422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22405898596 + 25 = 149686^2 + 5^2 .

It is a cyclic number.

It is not a de Polignac number, because 22405898621 - 2¹⁰ = 22405897597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22405898321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11202949310 + 11202949311.

It is an arithmetic number, because the mean of its divisors is an integer number (11202949311).

Almost surely, 2^22405898621 is an apocalyptic number.

It is an amenable number.

22405898621 is a deficient number, since it is larger than the sum of its proper divisors (1).

22405898621 is an equidigital number, since it uses as much as digits as its factorization.

22405898621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 552960, while the sum is 47.

The spelling of 22405898621 in words is "twenty-two billion, four hundred five million, eight hundred ninety-eight thousand, six hundred twenty-one".