23772665387 has 4 divisors (see below), whose sum is σ = 24352486536. Its totient is φ = 23192844240.

The previous prime is 23772665359. The next prime is 23772665437. The reversal of 23772665387 is 78356627732.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23772665387 - 2¹² = 23772661291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23772665327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 289910513 + ... + 289910594.

It is an arithmetic number, because the mean of its divisors is an integer number (6088121634).

Almost surely, 2^23772665387 is an apocalyptic number.

23772665387 is a deficient number, since it is larger than the sum of its proper divisors (579821149).

23772665387 is an equidigital number, since it uses as much as digits as its factorization.

23772665387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579821148.

The product of its digits is 17781120, while the sum is 56.

The spelling of 23772665387 in words is "twenty-three billion, seven hundred seventy-two million, six hundred sixty-five thousand, three hundred eighty-seven".