31887147874 has 12 divisors (see below), whose sum is σ = 49025783682. Its totient is φ = 15554704640.

The previous prime is 31887147871. The next prime is 31887147881. The reversal of 31887147874 is 47874178813.

It can be written as a sum of positive squares in 3 ways, for example, as 21328557849 + 10558590025 = 146043^2 + 102755^2 .

It is not an unprimeable number, because it can be changed into a prime (31887147871) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 4738927 + ... + 4745650.

Almost surely, 2^31887147874 is an apocalyptic number.

31887147874 is a deficient number, since it is larger than the sum of its proper divisors (17138635808).

31887147874 is an equidigital number, since it uses as much as digits as its factorization.

31887147874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9484661 (or 9484620 counting only the distinct ones).

The product of its digits is 8429568, while the sum is 58.

The spelling of 31887147874 in words is "thirty-one billion, eight hundred eighty-seven million, one hundred forty-seven thousand, eight hundred seventy-four".