31606732340 has 48 divisors (see below), whose sum is σ = 66810985920. Its totient is φ = 12559706880.

The previous prime is 31606732327. The next prime is 31606732343. The reversal of 31606732340 is 4323760613.

It is a self number, because there is not a number n which added to its sum of digits gives 31606732340.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31606732343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2394599 + ... + 2407761.

It is an arithmetic number, because the mean of its divisors is an integer number (1391895540).

Almost surely, 2^31606732340 is an apocalyptic number.

It is an amenable number.

31606732340 is an abundant number, since it is smaller than the sum of its proper divisors (35204253580).

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

31606732340 is a wasteful number, since it uses less digits than its factorization.

31606732340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13952 (or 13950 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 35.

The spelling of 31606732340 in words is "thirty-one billion, six hundred six million, seven hundred thirty-two thousand, three hundred forty".