31800038842 has 32 divisors (see below), whose sum is σ = 56050263360. Its totient is φ = 13340046720.

The previous prime is 31800038839. The next prime is 31800038843. The reversal of 31800038842 is 24883000813.

It is a super-2 number, since 2×31800038842² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31800038843) 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, 2283633 + ... + 2297515.

It is an arithmetic number, because the mean of its divisors is an integer number (1751570730).

Almost surely, 2^31800038842 is an apocalyptic number.

31800038842 is a deficient number, since it is larger than the sum of its proper divisors (24250224518).

31800038842 is a wasteful number, since it uses less digits than its factorization.

31800038842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21918.

The product of its (nonzero) digits is 36864, while the sum is 37.

The spelling of 31800038842 in words is "thirty-one billion, eight hundred million, thirty-eight thousand, eight hundred forty-two".