31742885873 has 4 divisors (see below), whose sum is σ = 31746543600. Its totient is φ = 31739228148.

The previous prime is 31742885851. The next prime is 31742885893. The reversal of 31742885873 is 37858824713.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31742885873 - 2²⁴ = 31726108657 is a prime.

It is a super-2 number, since 2×31742885873² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31742885813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1815815 + ... + 1833212.

It is an arithmetic number, because the mean of its divisors is an integer number (7936635900).

Almost surely, 2^31742885873 is an apocalyptic number.

It is an amenable number.

31742885873 is a deficient number, since it is larger than the sum of its proper divisors (3657727).

31742885873 is an equidigital number, since it uses as much as digits as its factorization.

31742885873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3657726.

The product of its digits is 9031680, while the sum is 56.

The spelling of 31742885873 in words is "thirty-one billion, seven hundred forty-two million, eight hundred eighty-five thousand, eight hundred seventy-three".