31998000032 has 24 divisors (see below), whose sum is σ = 66701714436. Its totient is φ = 15057882112.

The previous prime is 31998000031. The next prime is 31998000053. The reversal of 31998000032 is 23000089913.

It can be written as a sum of positive squares in 2 ways, for example, as 31200276496 + 797723536 = 176636^2 + 28244^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31997999956 and 31998000001.

It is not an unprimeable number, because it can be changed into a prime (31998000031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29409383 + ... + 29410470.

Almost surely, 2^31998000032 is an apocalyptic number.

31998000032 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31998000032 is an abundant number, since it is smaller than the sum of its proper divisors (34703714404).

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

31998000032 is a wasteful number, since it uses less digits than its factorization.

31998000032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58819880 (or 58819872 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 35.

Adding to 31998000032 its reverse (23000089913), we get a palindrome (54998089945).

The spelling of 31998000032 in words is "thirty-one billion, nine hundred ninety-eight million, thirty-two", and thus it is an aban number.