31314730736 has 80 divisors (see below), whose sum is σ = 65414908416. Its totient is φ = 14485540608.

The previous prime is 31314730709. The next prime is 31314730751. The reversal of 31314730736 is 63703741313.

It is a happy number.

It is a super-2 number, since 2×31314730736² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31314730736.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1620266 + ... + 1639478.

Almost surely, 2^31314730736 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 31314730736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32707454208).

31314730736 is an abundant number, since it is smaller than the sum of its proper divisors (34100177680).

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

31314730736 is a wasteful number, since it uses less digits than its factorization.

31314730736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19390 (or 19384 counting only the distinct ones).

The product of its (nonzero) digits is 95256, while the sum is 38.

The spelling of 31314730736 in words is "thirty-one billion, three hundred fourteen million, seven hundred thirty thousand, seven hundred thirty-six".