31842397690 has 16 divisors (see below), whose sum is σ = 57823541928. Its totient is φ = 12624242176.

The previous prime is 31842397667. The next prime is 31842397703. The reversal of 31842397690 is 9679324813.

It can be written as a sum of positive squares in 4 ways, for example, as 15224351769 + 16618045921 = 123387^2 + 128911^2 .

It is a super-2 number, since 2×31842397690² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14088427 + ... + 14090686.

Almost surely, 2^31842397690 is an apocalyptic number.

31842397690 is a deficient number, since it is larger than the sum of its proper divisors (25981144238).

31842397690 is a wasteful number, since it uses less digits than its factorization.

31842397690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28179233.

The product of its (nonzero) digits is 1959552, while the sum is 52.

The spelling of 31842397690 in words is "thirty-one billion, eight hundred forty-two million, three hundred ninety-seven thousand, six hundred ninety".