18374729472 has 180 divisors, whose sum is σ = 59771780376. Its totient is φ = 5568030720.

The previous prime is 18374729441. The next prime is 18374729491. The reversal of 18374729472 is 27492747381.

18374729472 is a `hidden beast` number, since 1 + 83 + 7 + 472 + 94 + 7 + 2 = 666.

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

It is a congruent number.

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 19 ways as a sum of consecutive naturals, for example, 187818 + ... + 268374.

Almost surely, 2^18374729472 is an apocalyptic number.

18374729472 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 18374729472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29885890188).

18374729472 is an abundant number, since it is smaller than the sum of its proper divisors (41397050904).

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

18374729472 is an equidigital number, since it uses as much as digits as its factorization.

18374729472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80596 (or 80573 counting only the distinct ones).

The product of its digits is 4741632, while the sum is 54.

The spelling of 18374729472 in words is "eighteen billion, three hundred seventy-four million, seven hundred twenty-nine thousand, four hundred seventy-two".