22526087981 has 2 divisors, whose sum is σ = 22526087982. Its totient is φ = 22526087980.

The previous prime is 22526087957. The next prime is 22526087999. The reversal of 22526087981 is 18978062522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17937244900 + 4588843081 = 133930^2 + 67741^2 .

It is a cyclic number.

It is not a de Polignac number, because 22526087981 - 2²² = 22521893677 is a prime.

It is a super-2 number, since 2×22526087981² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22526083981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11263043990 + 11263043991.

It is an arithmetic number, because the mean of its divisors is an integer number (11263043991).

Almost surely, 2^22526087981 is an apocalyptic number.

It is an amenable number.

22526087981 is a deficient number, since it is larger than the sum of its proper divisors (1).

22526087981 is an equidigital number, since it uses as much as digits as its factorization.

22526087981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 967680, while the sum is 50.

The spelling of 22526087981 in words is "twenty-two billion, five hundred twenty-six million, eighty-seven thousand, nine hundred eighty-one".