18536019493824 has 896 divisors, whose sum is σ = 68504823152640. Its totient is φ = 4792703385600.

The previous prime is 18536019493813. The next prime is 18536019493837. The reversal of 18536019493824 is 42839491063581.

18536019493824 is a `hidden beast` number, since 1 + 8 + 5 + 3 + 60 + 1 + 9 + 493 + 82 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1000801684 + ... + 1000820204.

It is an arithmetic number, because the mean of its divisors is an integer number (76456275840).

Almost surely, 2^{18536019493824} is an apocalyptic number.

18536019493824 is a gapful number since it is divisible by the number (14) 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 18536019493824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34252411576320).

18536019493824 is an abundant number, since it is smaller than the sum of its proper divisors (49968803658816).

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

18536019493824 is a wasteful number, since it uses less digits than its factorization.

18536019493824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18754 (or 18738 counting only the distinct ones).

The product of its (nonzero) digits is 44789760, while the sum is 63.

The spelling of 18536019493824 in words is "eighteen trillion, five hundred thirty-six billion, nineteen million, four hundred ninety-three thousand, eight hundred twenty-four".