18059405472 has 72 divisors (see below), whose sum is σ = 51374150100. Its totient is φ = 6017725440.

The previous prime is 18059405459. The next prime is 18059405479. The reversal of 18059405472 is 27450495081.

18059405472 is a `hidden beast` number, since 1 + 8 + 0 + 594 + 0 + 54 + 7 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 17957072016 + 102333456 = 134004^2 + 10116^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×18059405472² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18059405479) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 984222 + ... + 1002402.

Almost surely, 2^18059405472 is an apocalyptic number.

18059405472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18059405472 is an abundant number, since it is smaller than the sum of its proper divisors (33314744628).

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

18059405472 is a wasteful number, since it uses less digits than its factorization.

18059405472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21646 (or 21635 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The spelling of 18059405472 in words is "eighteen billion, fifty-nine million, four hundred five thousand, four hundred seventy-two".