31994019394 has 8 divisors (see below), whose sum is σ = 48061918908. Its totient is φ = 15973379760.

The previous prime is 31994019367. The next prime is 31994019401. The reversal of 31994019394 is 49391049913.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19786642225 + 12207377169 = 140665^2 + 110487^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 11813277 + ... + 11815984.

Almost surely, 2^31994019394 is an apocalyptic number.

31994019394 is a deficient number, since it is larger than the sum of its proper divisors (16067899514).

31994019394 is a wasteful number, since it uses less digits than its factorization.

31994019394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23629940.

The product of its (nonzero) digits is 944784, while the sum is 52.

The spelling of 31994019394 in words is "thirty-one billion, nine hundred ninety-four million, nineteen thousand, three hundred ninety-four".