31840578442 has 16 divisors (see below), whose sum is σ = 50792898240. Its totient is φ = 14926889088.

The previous prime is 31840578403. The next prime is 31840578479. The reversal of 31840578442 is 24487504813.

It is a junction number, because it is equal to n+sod(n) for n = 31840578392 and 31840578401.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4315438 + ... + 4322809.

It is an arithmetic number, because the mean of its divisors is an integer number (3174556140).

Almost surely, 2^31840578442 is an apocalyptic number.

31840578442 is a deficient number, since it is larger than the sum of its proper divisors (18952319798).

31840578442 is a wasteful number, since it uses less digits than its factorization.

31840578442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8638365.

The product of its (nonzero) digits is 860160, while the sum is 46.

The spelling of 31840578442 in words is "thirty-one billion, eight hundred forty million, five hundred seventy-eight thousand, four hundred forty-two".