23745315921 has 8 divisors (see below), whose sum is σ = 31662064320. Its totient is φ = 15829389072.

The previous prime is 23745315883. The next prime is 23745315931. The reversal of 23745315921 is 12951354732.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23745315921 - 2⁷ = 23745315793 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (23745315931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134445 + ... + 256058.

It is an arithmetic number, because the mean of its divisors is an integer number (3957758040).

Almost surely, 2^23745315921 is an apocalyptic number.

It is an amenable number.

23745315921 is a deficient number, since it is larger than the sum of its proper divisors (7916748399).

23745315921 is a wasteful number, since it uses less digits than its factorization.

23745315921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410775.

The product of its digits is 226800, while the sum is 42.

The spelling of 23745315921 in words is "twenty-three billion, seven hundred forty-five million, three hundred fifteen thousand, nine hundred twenty-one".