31494883812 has 96 divisors (see below), whose sum is σ = 86333640960. Its totient is φ = 8747481600.

The previous prime is 31494883807. The next prime is 31494883829. The reversal of 31494883812 is 21838849413.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4039614 + ... + 4047402.

It is an arithmetic number, because the mean of its divisors is an integer number (899308760).

Almost surely, 2^31494883812 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31494883812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43166820480).

31494883812 is an abundant number, since it is smaller than the sum of its proper divisors (54838757148).

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

31494883812 is a wasteful number, since it uses less digits than its factorization.

31494883812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9141 (or 9139 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 51.

The spelling of 31494883812 in words is "thirty-one billion, four hundred ninety-four million, eight hundred eighty-three thousand, eight hundred twelve".