23645389720 has 64 divisors (see below), whose sum is σ = 53616790080. Its totient is φ = 9384646656.

The previous prime is 23645389693. The next prime is 23645389727. The reversal of 23645389720 is 2798354632.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23645389727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4118692 + ... + 4124428.

It is an arithmetic number, because the mean of its divisors is an integer number (837762345).

Almost surely, 2^23645389720 is an apocalyptic number.

23645389720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23645389720 is an abundant number, since it is smaller than the sum of its proper divisors (29971400360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23645389720 is a wasteful number, since it uses less digits than its factorization.

23645389720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6532 (or 6528 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 49.

The spelling of 23645389720 in words is "twenty-three billion, six hundred forty-five million, three hundred eighty-nine thousand, seven hundred twenty".