31851794852 has 24 divisors (see below), whose sum is σ = 56214012960. Its totient is φ = 15791163200.

The previous prime is 31851794851. The next prime is 31851794857. The reversal of 31851794852 is 25849715813.

It is a junction number, because it is equal to n+sod(n) for n = 31851794794 and 31851794803.

It is not an unprimeable number, because it can be changed into a prime (31851794851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184352 + ... + 312552.

It is an arithmetic number, because the mean of its divisors is an integer number (2342250540).

Almost surely, 2^31851794852 is an apocalyptic number.

It is an amenable number.

31851794852 is a deficient number, since it is larger than the sum of its proper divisors (24362218108).

31851794852 is a wasteful number, since it uses less digits than its factorization.

31851794852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128731 (or 128729 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 53.

The spelling of 31851794852 in words is "thirty-one billion, eight hundred fifty-one million, seven hundred ninety-four thousand, eight hundred fifty-two".