23397971808 has 24 divisors (see below), whose sum is σ = 61419676248. Its totient is φ = 7799323904.

The previous prime is 23397971801. The next prime is 23397971809. The reversal of 23397971808 is 80817979332.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23397971801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121864341 + ... + 121864532.

It is an arithmetic number, because the mean of its divisors is an integer number (2559153177).

Almost surely, 2^23397971808 is an apocalyptic number.

It is an amenable number.

23397971808 is an abundant number, since it is smaller than the sum of its proper divisors (38021704440).

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

23397971808 is a wasteful number, since it uses less digits than its factorization.

23397971808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243728886 (or 243728878 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 57.

The spelling of 23397971808 in words is "twenty-three billion, three hundred ninety-seven million, nine hundred seventy-one thousand, eight hundred eight".