23181977936 has 40 divisors (see below), whose sum is σ = 49549865064. Its totient is φ = 10438410240.

The previous prime is 23181977867. The next prime is 23181977953. The reversal of 23181977936 is 63977918132.

It can be written as a sum of positive squares in 4 ways, for example, as 1105961536 + 22076016400 = 33256^2 + 148580^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1350641 + ... + 1367696.

Almost surely, 2^23181977936 is an apocalyptic number.

23181977936 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

23181977936 is an abundant number, since it is smaller than the sum of its proper divisors (26367887128).

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

23181977936 is a wasteful number, since it uses less digits than its factorization.

23181977936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2718399 (or 2718393 counting only the distinct ones).

The product of its digits is 3429216, while the sum is 56.

The spelling of 23181977936 in words is "twenty-three billion, one hundred eighty-one million, nine hundred seventy-seven thousand, nine hundred thirty-six".