18912635485956 has 243 divisors, whose sum is σ = 50103820294983. Its totient is φ = 6015003541920.

The previous prime is 18912635485943. The next prime is 18912635486033. The reversal of 18912635485956 is 65958453621981.

The square root of 18912635485956 is 4348866.

It is a perfect power (a square), and thus also a powerful number.

18912635485956 is a `hidden beast` number, since 1 + 8 + 9 + 1 + 26 + 3 + 5 + 4 + 8 + 595 + 6 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 83315574715 + ... + 83315574941.

Almost surely, 2^{18912635485956} is an apocalyptic number.

18912635485956 is the 4348866-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18912635485956

18912635485956 is an abundant number, since it is smaller than the sum of its proper divisors (31191184809027).

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

18912635485956 is a wasteful number, since it uses less digits than its factorization.

18912635485956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732 (or 366 counting only the distinct ones).

The product of its digits is 559872000, while the sum is 72.

The spelling of 18912635485956 in words is "eighteen trillion, nine hundred twelve billion, six hundred thirty-five million, four hundred eighty-five thousand, nine hundred fifty-six".