23769242721 has 40 divisors (see below), whose sum is σ = 40600521984. Its totient is φ = 13575418560.

The previous prime is 23769242719. The next prime is 23769242759. The reversal of 23769242721 is 12724296732.

23769242721 is a `hidden beast` number, since 2 + 376 + 9 + 2 + 4 + 272 + 1 = 666.

It is not a de Polignac number, because 23769242721 - 2¹ = 23769242719 is a prime.

It is a super-2 number, since 2×23769242721² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23769242701) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1211016 + ... + 1230486.

Almost surely, 2^23769242721 is an apocalyptic number.

23769242721 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

23769242721 is a deficient number, since it is larger than the sum of its proper divisors (16831279263).

23769242721 is a wasteful number, since it uses less digits than its factorization.

23769242721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21643 (or 21634 counting only the distinct ones).

The product of its digits is 508032, while the sum is 45.

The spelling of 23769242721 in words is "twenty-three billion, seven hundred sixty-nine million, two hundred forty-two thousand, seven hundred twenty-one".