23681656818 has 12 divisors (see below), whose sum is σ = 51310256478. Its totient is φ = 7893885600.

The previous prime is 23681656799. The next prime is 23681656841. The reversal of 23681656818 is 81865618632.

23681656818 is a `hidden beast` number, since 2 + 3 + 68 + 1 + 6 + 568 + 18 = 666.

It can be written as a sum of positive squares in only one way, i.e., 15500997009 + 8180659809 = 124503^2 + 90447^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 657823783 + ... + 657823818.

Almost surely, 2^23681656818 is an apocalyptic number.

23681656818 is an abundant number, since it is smaller than the sum of its proper divisors (27628599660).

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

23681656818 is a wasteful number, since it uses less digits than its factorization.

23681656818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315647609 (or 1315647606 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 54.

The spelling of 23681656818 in words is "twenty-three billion, six hundred eighty-one million, six hundred fifty-six thousand, eight hundred eighteen".