31693921147 has 16 divisors (see below), whose sum is σ = 39057984000. Its totient is φ = 25108695360.

The previous prime is 31693921111. The next prime is 31693921169. The reversal of 31693921147 is 74112939613.

It is a de Polignac number, because none of the positive numbers 2^k-31693921147 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31693921097 and 31693921106.

It is not an unprimeable number, because it can be changed into a prime (31693925147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2900647 + ... + 2911552.

It is an arithmetic number, because the mean of its divisors is an integer number (2441124000).

Almost surely, 2^31693921147 is an apocalyptic number.

31693921147 is a deficient number, since it is larger than the sum of its proper divisors (7364062853).

31693921147 is a wasteful number, since it uses less digits than its factorization.

31693921147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5812266.

The product of its digits is 244944, while the sum is 46.

The spelling of 31693921147 in words is "thirty-one billion, six hundred ninety-three million, nine hundred twenty-one thousand, one hundred forty-seven".