18963818401536 has 432 divisors, whose sum is σ = 58077445739040. Its totient is φ = 5934384414720.

The previous prime is 18963818401513. The next prime is 18963818401579. The reversal of 18963818401536 is 63510481836981.

18963818401536 is a `hidden beast` number, since 1 + 8 + 96 + 3 + 8 + 1 + 8 + 4 + 0 + 1 + 536 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3844274526 + ... + 3844279458.

Almost surely, 2^{18963818401536} is an apocalyptic number.

18963818401536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18963818401536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29038722869520).

18963818401536 is an abundant number, since it is smaller than the sum of its proper divisors (39113627337504).

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

18963818401536 is a wasteful number, since it uses less digits than its factorization.

18963818401536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5752 (or 5735 counting only the distinct ones).

The product of its (nonzero) digits is 29859840, while the sum is 63.

The spelling of 18963818401536 in words is "eighteen trillion, nine hundred sixty-three billion, eight hundred eighteen million, four hundred one thousand, five hundred thirty-six".