31011919092 has 432 divisors, whose sum is σ = 108256680000. Its totient is φ = 7628100480.

The previous prime is 31011919091. The next prime is 31011919121. The reversal of 31011919092 is 29091911013.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31011919091) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 12165034 + ... + 12167582.

Almost surely, 2^31011919092 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 31011919092, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54128340000).

31011919092 is an abundant number, since it is smaller than the sum of its proper divisors (77244760908).

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

31011919092 is a wasteful number, since it uses less digits than its factorization.

31011919092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2617 (or 2591 counting only the distinct ones).

The product of its (nonzero) digits is 4374, while the sum is 36.

The spelling of 31011919092 in words is "thirty-one billion, eleven million, nine hundred nineteen thousand, ninety-two".