23745363921 has 144 divisors (see below), whose sum is σ = 40240007808. Its totient is φ = 13959475200.

The previous prime is 23745363919. The next prime is 23745364021. The reversal of 23745363921 is 12936354732.

23745363921 is a `hidden beast` number, since 2 + 3 + 7 + 4 + 5 + 3 + 639 + 2 + 1 = 666.

It is not a de Polignac number, because 23745363921 - 2¹ = 23745363919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23745365921) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 98528361 + ... + 98528601.

Almost surely, 2^23745363921 is an apocalyptic number.

It is an amenable number.

23745363921 is a deficient number, since it is larger than the sum of its proper divisors (16494643887).

23745363921 is a wasteful number, since it uses less digits than its factorization.

23745363921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374 (or 345 counting only the distinct ones).

The product of its digits is 816480, while the sum is 45.

The spelling of 23745363921 in words is "twenty-three billion, seven hundred forty-five million, three hundred sixty-three thousand, nine hundred twenty-one".