18396752784 has 80 divisors (see below), whose sum is σ = 48693050112. Its totient is φ = 5982372864.

The previous prime is 18396752761. The next prime is 18396752813. The reversal of 18396752784 is 48725769381.

It is a super-2 number, since 2×18396752784² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 693102 + ... + 719154.

Almost surely, 2^18396752784 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18396752784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24346525056).

18396752784 is an abundant number, since it is smaller than the sum of its proper divisors (30296297328).

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

18396752784 is a wasteful number, since it uses less digits than its factorization.

18396752784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26424 (or 26418 counting only the distinct ones).

The product of its digits is 20321280, while the sum is 60.

The spelling of 18396752784 in words is "eighteen billion, three hundred ninety-six million, seven hundred fifty-two thousand, seven hundred eighty-four".