30631681930 has 8 divisors (see below), whose sum is σ = 55137027492. Its totient is φ = 12252672768.

The previous prime is 30631681919. The next prime is 30631681937. The reversal of 30631681930 is 3918613603.

It can be written as a sum of positive squares in 2 ways, for example, as 30614150961 + 17530969 = 174969^2 + 4187^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (30631681937) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1531584087 + ... + 1531584106.

Almost surely, 2^30631681930 is an apocalyptic number.

30631681930 is a deficient number, since it is larger than the sum of its proper divisors (24505345562).

30631681930 is a wasteful number, since it uses less digits than its factorization.

30631681930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3063168200.

The product of its (nonzero) digits is 69984, while the sum is 40.

The spelling of 30631681930 in words is "thirty billion, six hundred thirty-one million, six hundred eighty-one thousand, nine hundred thirty".