18326994804720 has 800 divisors, whose sum is σ = 73243526400000. Its totient is φ = 4160432719872.

The previous prime is 18326994804719. The next prime is 18326994804737. The reversal of 18326994804720 is 2740849962381.

18326994804720 is a `hidden beast` number, since 1 + 8 + 3 + 2 + 6 + 99 + 480 + 47 + 20 = 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 159 ways as a sum of consecutive naturals, for example, 6111033781 + ... + 6111036779.

It is an arithmetic number, because the mean of its divisors is an integer number (91554408000).

Almost surely, 2^{18326994804720} is an apocalyptic number.

18326994804720 is a gapful number since it is divisible by the number (10) 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 18326994804720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36621763200000).

18326994804720 is an abundant number, since it is smaller than the sum of its proper divisors (54916531595280).

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

18326994804720 is a wasteful number, since it uses less digits than its factorization.

18326994804720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3907 (or 3892 counting only the distinct ones).

The product of its (nonzero) digits is 41803776, while the sum is 63.

The spelling of 18326994804720 in words is "eighteen trillion, three hundred twenty-six billion, nine hundred ninety-four million, eight hundred four thousand, seven hundred twenty".