23640887851 has 12 divisors (see below), whose sum is σ = 27503161200. Its totient is φ = 20261749200.

The previous prime is 23640887833. The next prime is 23640887903. The reversal of 23640887851 is 15878804632.

It is not a de Polignac number, because 23640887851 - 2¹⁵ = 23640855083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23640887951) 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, 903450 + ... + 929248.

It is an arithmetic number, because the mean of its divisors is an integer number (2291930100).

Almost surely, 2^23640887851 is an apocalyptic number.

23640887851 is a deficient number, since it is larger than the sum of its proper divisors (3862273349).

23640887851 is a wasteful number, since it uses less digits than its factorization.

23640887851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44514 (or 44507 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 52.

The spelling of 23640887851 in words is "twenty-three billion, six hundred forty million, eight hundred eighty-seven thousand, eight hundred fifty-one".