13331311020 has 96 divisors (see below), whose sum is σ = 42905419200. Its totient is φ = 3432425472.

The previous prime is 13331311001. The next prime is 13331311033. The reversal of 13331311020 is 2011313331.

It is a happy number.

13331311020 is a `hidden beast` number, since 1 + 3 + 331 + 311 + 0 + 20 = 666.

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 = 13331310984 and 13331311002.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 409989 + ... + 441308.

It is an arithmetic number, because the mean of its divisors is an integer number (446931450).

Almost surely, 2^13331311020 is an apocalyptic number.

13331311020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13331311020 is an abundant number, since it is smaller than the sum of its proper divisors (29574108180).

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

13331311020 is a wasteful number, since it uses less digits than its factorization.

13331311020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851344 (or 851336 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 13331311020 its reverse (2011313331), we get a palindrome (15342624351).

The spelling of 13331311020 in words is "thirteen billion, three hundred thirty-one million, three hundred eleven thousand, twenty".