31019089892 has 48 divisors (see below), whose sum is σ = 63690375168. Its totient is φ = 12942821280.

The previous prime is 31019089879. The next prime is 31019089903. The reversal of 31019089892 is 29898091013.

It is a happy number.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 31019089892.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189653 + ... + 313059.

It is an arithmetic number, because the mean of its divisors is an integer number (1326882816).

Almost surely, 2^31019089892 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 31019089892, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31845187584).

31019089892 is an abundant number, since it is smaller than the sum of its proper divisors (32671285276).

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

31019089892 is a wasteful number, since it uses less digits than its factorization.

31019089892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123656 (or 123654 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 50.

The spelling of 31019089892 in words is "thirty-one billion, nineteen million, eighty-nine thousand, eight hundred ninety-two".