18201468656 has 60 divisors (see below), whose sum is σ = 41044413168. Its totient is φ = 7796549376.

The previous prime is 18201468643. The next prime is 18201468689. The reversal of 18201468656 is 65686410281.

It is a super-2 number, since 2×18201468656² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18201468656.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1858685 + ... + 1868451.

Almost surely, 2^18201468656 is an apocalyptic number.

18201468656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18201468656 is an abundant number, since it is smaller than the sum of its proper divisors (22842944512).

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

18201468656 is a wasteful number, since it uses less digits than its factorization.

18201468656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12166 (or 12153 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 47.

The spelling of 18201468656 in words is "eighteen billion, two hundred one million, four hundred sixty-eight thousand, six hundred fifty-six".