31839893813 has 16 divisors (see below), whose sum is σ = 39193437696. Its totient is φ = 25188226560.

The previous prime is 31839893801. The next prime is 31839893843.

It is a happy number.

31839893813 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 31839893813 - 2¹² = 31839889717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31839893843) 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, 691220 + ... + 735842.

It is an arithmetic number, because the mean of its divisors is an integer number (2449589856).

Almost surely, 2^31839893813 is an apocalyptic number.

It is an amenable number.

31839893813 is a deficient number, since it is larger than the sum of its proper divisors (7353543883).

31839893813 is a wasteful number, since it uses less digits than its factorization.

31839893813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52484.

The product of its digits is 3359232, while the sum is 56.

The spelling of 31839893813 in words is "thirty-one billion, eight hundred thirty-nine million, eight hundred ninety-three thousand, eight hundred thirteen".