31794770318 has 4 divisors (see below), whose sum is σ = 47692155480. Its totient is φ = 15897385158.

The previous prime is 31794770317. The next prime is 31794770321. The reversal of 31794770318 is 81307749713.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81307749713 = 37 ⋅2197506749.

It is a super-2 number, since 2×31794770318² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31794770311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7948692578 + ... + 7948692581.

It is an arithmetic number, because the mean of its divisors is an integer number (11923038870).

Almost surely, 2^31794770318 is an apocalyptic number.

31794770318 is a deficient number, since it is larger than the sum of its proper divisors (15897385162).

31794770318 is a wasteful number, since it uses less digits than its factorization.

31794770318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15897385161.

The product of its (nonzero) digits is 889056, while the sum is 50.

The spelling of 31794770318 in words is "thirty-one billion, seven hundred ninety-four million, seven hundred seventy thousand, three hundred eighteen".