331020013320 has 96 divisors (see below), whose sum is σ = 1078525370520. Its totient is φ = 88049617920.

The previous prime is 331020013309. The next prime is 331020013321. The reversal of 331020013320 is 23310020133.

331020013320 is a `hidden beast` number, since 3 + 310 + 20 + 0 + 1 + 332 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 270027808164 + 60992205156 = 519642^2 + 246966^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 331020013293 and 331020013302.

It is not an unprimeable number, because it can be changed into a prime (331020013321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1015141 + ... + 1300980.

Almost surely, 2^331020013320 is an apocalyptic number.

331020013320 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

331020013320 is an abundant number, since it is smaller than the sum of its proper divisors (747505357200).

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

331020013320 is a wasteful number, since it uses less digits than its factorization.

331020013320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2316535 (or 2316528 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 331020013320 its reverse (23310020133), we get a palindrome (354330033453).

The spelling of 331020013320 in words is "three hundred thirty-one billion, twenty million, thirteen thousand, three hundred twenty".