23656990540 has 12 divisors (see below), whose sum is σ = 49679680176. Its totient is φ = 9462796208.

The previous prime is 23656990523. The next prime is 23656990541. The reversal of 23656990540 is 4509965632.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (23656990541) 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, 591424744 + ... + 591424783.

It is an arithmetic number, because the mean of its divisors is an integer number (4139973348).

Almost surely, 2^23656990540 is an apocalyptic number.

23656990540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23656990540 is an abundant number, since it is smaller than the sum of its proper divisors (26022689636).

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

23656990540 is a wasteful number, since it uses less digits than its factorization.

23656990540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1182849536 (or 1182849534 counting only the distinct ones).

The product of its (nonzero) digits is 1749600, while the sum is 49.

The spelling of 23656990540 in words is "twenty-three billion, six hundred fifty-six million, nine hundred ninety thousand, five hundred forty".