31640023634 has 32 divisors (see below), whose sum is σ = 48714587136. Its totient is φ = 15406634880.

The previous prime is 31640023627. The next prime is 31640023673. The reversal of 31640023634 is 43632004613.

It is a self number, because there is not a number n which added to its sum of digits gives 31640023634.

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 15 ways as a sum of consecutive naturals, for example, 11073134 + ... + 11075990.

It is an arithmetic number, because the mean of its divisors is an integer number (1522330848).

Almost surely, 2^31640023634 is an apocalyptic number.

31640023634 is a deficient number, since it is larger than the sum of its proper divisors (17074563502).

31640023634 is a wasteful number, since it uses less digits than its factorization.

31640023634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3650.

The product of its (nonzero) digits is 31104, while the sum is 32.

The spelling of 31640023634 in words is "thirty-one billion, six hundred forty million, twenty-three thousand, six hundred thirty-four".