22641442081 has 2 divisors, whose sum is σ = 22641442082. Its totient is φ = 22641442080.

The previous prime is 22641442039. The next prime is 22641442111. The reversal of 22641442081 is 18024414622.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15886081600 + 6755360481 = 126040^2 + 82191^2 .

It is a cyclic number.

It is not a de Polignac number, because 22641442081 - 2¹⁵ = 22641409313 is a prime.

It is a super-2 number, since 2×22641442081² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22641442781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11320721040 + 11320721041.

It is an arithmetic number, because the mean of its divisors is an integer number (11320721041).

Almost surely, 2^22641442081 is an apocalyptic number.

It is an amenable number.

22641442081 is a deficient number, since it is larger than the sum of its proper divisors (1).

22641442081 is an equidigital number, since it uses as much as digits as its factorization.

22641442081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24576, while the sum is 34.

The spelling of 22641442081 in words is "twenty-two billion, six hundred forty-one million, four hundred forty-two thousand, eighty-one".