18916886938560 has 168 divisors, whose sum is σ = 65036593655280. Its totient is φ = 4656464437248.

The previous prime is 18916886938541. The next prime is 18916886938567. The reversal of 18916886938560 is 6583968861981.

It is a super-2 number, since 2×18916886938560² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (78).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18916886938567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58136845 + ... + 58461324.

Almost surely, 2^{18916886938560} is an apocalyptic number.

18916886938560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18916886938560 is an abundant number, since it is smaller than the sum of its proper divisors (46119706716720).

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

18916886938560 is a wasteful number, since it uses less digits than its factorization.

18916886938560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116598215 (or 116598192 counting only the distinct ones).

The product of its (nonzero) digits is 1074954240, while the sum is 78.

The spelling of 18916886938560 in words is "eighteen trillion, nine hundred sixteen billion, eight hundred eighty-six million, nine hundred thirty-eight thousand, five hundred sixty".