17999232912 has 400 divisors, whose sum is σ = 58270734720. Its totient is φ = 5337446400.

The previous prime is 17999232907. The next prime is 17999232913. The reversal of 17999232912 is 21923299971.

It is a super-3 number, since 3×17999232912³ (a number of 32 digits) contains 333 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (17999232913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 34547212 + ... + 34547732.

Almost surely, 2^17999232912 is an apocalyptic number.

17999232912 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 17999232912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29135367360).

17999232912 is an abundant number, since it is smaller than the sum of its proper divisors (40271501808).

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

17999232912 is a wasteful number, since it uses less digits than its factorization.

17999232912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644 (or 629 counting only the distinct ones).

The product of its digits is 1102248, while the sum is 54.

The spelling of 17999232912 in words is "seventeen billion, nine hundred ninety-nine million, two hundred thirty-two thousand, nine hundred twelve".