23881073921 has 2 divisors, whose sum is σ = 23881073922. Its totient is φ = 23881073920.

The previous prime is 23881073899. The next prime is 23881073933. The reversal of 23881073921 is 12937018832.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23750200321 + 130873600 = 154111^2 + 11440^2 .

It is a cyclic number.

It is not a de Polignac number, because 23881073921 - 2¹⁴ = 23881057537 is a prime.

It is not a weakly prime, because it can be changed into another prime (23881075921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11940536960 + 11940536961.

It is an arithmetic number, because the mean of its divisors is an integer number (11940536961).

Almost surely, 2^23881073921 is an apocalyptic number.

It is an amenable number.

23881073921 is a deficient number, since it is larger than the sum of its proper divisors (1).

23881073921 is an equidigital number, since it uses as much as digits as its factorization.

23881073921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 44.

The spelling of 23881073921 in words is "twenty-three billion, eight hundred eighty-one million, seventy-three thousand, nine hundred twenty-one".