23921358939 has 80 divisors (see below), whose sum is σ = 37780807680. Its totient is φ = 15065688960.

The previous prime is 23921358919. The next prime is 23921358941. The reversal of 23921358939 is 93985312932.

It is a happy number.

23921358939 is a `hidden beast` number, since 2 + 3 + 9 + 21 + 3 + 589 + 39 = 666.

It is not a de Polignac number, because 23921358939 - 2¹² = 23921354843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23921358919) 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 in 79 ways as a sum of consecutive naturals, for example, 18135322 + ... + 18136640.

It is an arithmetic number, because the mean of its divisors is an integer number (472260096).

Almost surely, 2^23921358939 is an apocalyptic number.

23921358939 is a deficient number, since it is larger than the sum of its proper divisors (13859448741).

23921358939 is a wasteful number, since it uses less digits than its factorization.

23921358939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1542 (or 1533 counting only the distinct ones).

The product of its digits is 3149280, while the sum is 54.

The spelling of 23921358939 in words is "twenty-three billion, nine hundred twenty-one million, three hundred fifty-eight thousand, nine hundred thirty-nine".