23356672981 has 2 divisors, whose sum is σ = 23356672982. Its totient is φ = 23356672980.

The previous prime is 23356672961. The next prime is 23356672987. The reversal of 23356672981 is 18927665332.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23327674756 + 28998225 = 152734^2 + 5385^2 .

It is a cyclic number.

It is not a de Polignac number, because 23356672981 - 2¹¹ = 23356670933 is a prime.

It is a super-2 number, since 2×23356672981² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23356672987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11678336490 + 11678336491.

It is an arithmetic number, because the mean of its divisors is an integer number (11678336491).

Almost surely, 2^23356672981 is an apocalyptic number.

It is an amenable number.

23356672981 is a deficient number, since it is larger than the sum of its proper divisors (1).

23356672981 is an equidigital number, since it uses as much as digits as its factorization.

23356672981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3265920, while the sum is 52.

The spelling of 23356672981 in words is "twenty-three billion, three hundred fifty-six million, six hundred seventy-two thousand, nine hundred eighty-one".