31906318746 has 64 divisors (see below), whose sum is σ = 67965194880. Its totient is φ = 9956966400.

The previous prime is 31906318733. The next prime is 31906318747. The reversal of 31906318746 is 64781360913.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31906318695 and 31906318704.

It is not an unprimeable number, because it can be changed into a prime (31906318747) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6825466 + ... + 6830138.

It is an arithmetic number, because the mean of its divisors is an integer number (1061956170).

Almost surely, 2^31906318746 is an apocalyptic number.

31906318746 is an abundant number, since it is smaller than the sum of its proper divisors (36058876134).

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

31906318746 is a wasteful number, since it uses less digits than its factorization.

31906318746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5391.

The product of its (nonzero) digits is 653184, while the sum is 48.

The spelling of 31906318746 in words is "thirty-one billion, nine hundred six million, three hundred eighteen thousand, seven hundred forty-six".