31020033330013 has 48 divisors (see below), whose sum is σ = 39157971540480. Its totient is φ = 24055757526528.

The previous prime is 31020033330001. The next prime is 31020033330017. The reversal of 31020033330013 is 31003333002013.

It is a de Polignac number, because none of the positive numbers 2^k-31020033330013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31020033330017) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11592231 + ... + 14014987.

It is an arithmetic number, because the mean of its divisors is an integer number (815791073760).

Almost surely, 2^{31020033330013} is an apocalyptic number.

It is an amenable number.

31020033330013 is a deficient number, since it is larger than the sum of its proper divisors (8137938210467).

31020033330013 is a wasteful number, since it uses less digits than its factorization.

31020033330013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2423006 (or 2422993 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 22.

Adding to 31020033330013 its reverse (31003333002013), we get a palindrome (62023366332026).

The spelling of 31020033330013 in words is "thirty-one trillion, twenty billion, thirty-three million, three hundred thirty thousand, thirteen".