23744339721 has 12 divisors (see below), whose sum is σ = 35094993648. Its totient is φ = 15461430264.

The previous prime is 23744339693. The next prime is 23744339741. The reversal of 23744339721 is 12793344732.

23744339721 is a `hidden beast` number, since 237 + 4 + 4 + 3 + 397 + 21 = 666.

It is not a de Polignac number, because 23744339721 - 2⁹ = 23744339209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23744339741) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30677055 + ... + 30677828.

It is an arithmetic number, because the mean of its divisors is an integer number (2924582804).

Almost surely, 2^23744339721 is an apocalyptic number.

It is an amenable number.

23744339721 is a deficient number, since it is larger than the sum of its proper divisors (11350653927).

23744339721 is a wasteful number, since it uses less digits than its factorization.

23744339721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61354932 (or 61354929 counting only the distinct ones).

The product of its digits is 762048, while the sum is 45.

The spelling of 23744339721 in words is "twenty-three billion, seven hundred forty-four million, three hundred thirty-nine thousand, seven hundred twenty-one".