31002110020 has 96 divisors (see below), whose sum is σ = 75709589760. Its totient is φ = 10443755520.

The previous prime is 31002110003. The next prime is 31002110123. The reversal of 31002110020 is 2001120013.

It is a super-2 number, since 2×31002110020² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 31002109979 and 31002110006.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3832380 + ... + 3840460.

It is an arithmetic number, because the mean of its divisors is an integer number (788641560).

Almost surely, 2^31002110020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31002110020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37854794880).

31002110020 is an abundant number, since it is smaller than the sum of its proper divisors (44707479740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31002110020 is a wasteful number, since it uses less digits than its factorization.

31002110020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8573 (or 8571 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 31002110020 its reverse (2001120013), we get a palindrome (33003230033).

The spelling of 31002110020 in words is "thirty-one billion, two million, one hundred ten thousand, twenty".