18360944784 has 320 divisors, whose sum is σ = 65842452480. Its totient is φ = 4769487360.

The previous prime is 18360944711. The next prime is 18360944803. The reversal of 18360944784 is 48744906381.

18360944784 is a `hidden beast` number, since 1 + 83 + 6 + 0 + 94 + 478 + 4 = 666.

It is a super-2 number, since 2×18360944784² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 18360944784.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2630419 + ... + 2637389.

It is an arithmetic number, because the mean of its divisors is an integer number (205757664).

Almost surely, 2^18360944784 is an apocalyptic number.

18360944784 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 18360944784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32921226240).

18360944784 is an abundant number, since it is smaller than the sum of its proper divisors (47481507696).

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

18360944784 is a wasteful number, since it uses less digits than its factorization.

18360944784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7075 (or 7063 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 54.

The spelling of 18360944784 in words is "eighteen billion, three hundred sixty million, nine hundred forty-four thousand, seven hundred eighty-four".