22008948961 has 2 divisors, whose sum is σ = 22008948962. Its totient is φ = 22008948960.

The previous prime is 22008948931. The next prime is 22008948977. The reversal of 22008948961 is 16984980022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21750350400 + 258598561 = 147480^2 + 16081^2 .

It is a cyclic number.

It is not a de Polignac number, because 22008948961 - 2²¹ = 22006851809 is a prime.

It is not a weakly prime, because it can be changed into another prime (22008948931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11004474480 + 11004474481.

It is an arithmetic number, because the mean of its divisors is an integer number (11004474481).

Almost surely, 2^22008948961 is an apocalyptic number.

It is an amenable number.

22008948961 is a deficient number, since it is larger than the sum of its proper divisors (1).

22008948961 is an equidigital number, since it uses as much as digits as its factorization.

22008948961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 497664, while the sum is 49.

The spelling of 22008948961 in words is "twenty-two billion, eight million, nine hundred forty-eight thousand, nine hundred sixty-one".