31908130194 has 32 divisors (see below), whose sum is σ = 64955105280. Its totient is φ = 10446554000.

The previous prime is 31908130171. The next prime is 31908130201. The reversal of 31908130194 is 49103180913.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 368299 + ... + 446609.

It is an arithmetic number, because the mean of its divisors is an integer number (2029847040).

Almost surely, 2^31908130194 is an apocalyptic number.

31908130194 is an abundant number, since it is smaller than the sum of its proper divisors (33046975086).

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

31908130194 is a wasteful number, since it uses less digits than its factorization.

31908130194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79526.

The product of its (nonzero) digits is 23328, while the sum is 39.

The spelling of 31908130194 in words is "thirty-one billion, nine hundred eight million, one hundred thirty thousand, one hundred ninety-four".