17998832772 has 60 divisors (see below), whose sum is σ = 49528968720. Its totient is φ = 5683839984.

The previous prime is 17998832737. The next prime is 17998832821. The reversal of 17998832772 is 27723889971.

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 19 ways as a sum of consecutive naturals, for example, 1455738 + ... + 1468049.

It is an arithmetic number, because the mean of its divisors is an integer number (825482812).

Almost surely, 2^17998832772 is an apocalyptic number.

17998832772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

17998832772 is an abundant number, since it is smaller than the sum of its proper divisors (31530135948).

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

17998832772 is a wasteful number, since it uses less digits than its factorization.

17998832772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2923822 (or 2923811 counting only the distinct ones).

The product of its digits is 21337344, while the sum is 63.

The spelling of 17998832772 in words is "seventeen billion, nine hundred ninety-eight million, eight hundred thirty-two thousand, seven hundred seventy-two".