18445743792 has 400 divisors, whose sum is σ = 63218453760. Its totient is φ = 5082518016.

The previous prime is 18445743781. The next prime is 18445743809. The reversal of 18445743792 is 29734754481.

18445743792 is a `hidden beast` number, since 1 + 84 + 45 + 7 + 437 + 92 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 60083703 + ... + 60084009.

Almost surely, 2^18445743792 is an apocalyptic number.

18445743792 is a gapful number since it is divisible by the number (12) 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 18445743792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31609226880).

18445743792 is an abundant number, since it is smaller than the sum of its proper divisors (44772709968).

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

18445743792 is a wasteful number, since it uses less digits than its factorization.

18445743792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550 (or 535 counting only the distinct ones).

The product of its digits is 6773760, while the sum is 54.

The spelling of 18445743792 in words is "eighteen billion, four hundred forty-five million, seven hundred forty-three thousand, seven hundred ninety-two".