20113331320 has 16 divisors (see below), whose sum is σ = 45254995560. Its totient is φ = 8045332512.

The previous prime is 20113331317. The next prime is 20113331327. The reversal of 20113331320 is 2313331102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20113331327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 251416602 + ... + 251416681.

Almost surely, 2^20113331320 is an apocalyptic number.

20113331320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20113331320 is an abundant number, since it is smaller than the sum of its proper divisors (25141664240).

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

20113331320 is a wasteful number, since it uses less digits than its factorization.

20113331320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502833294 (or 502833290 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 20113331320 its reverse (2313331102), we get a palindrome (22426662422).

The spelling of 20113331320 in words is "twenty billion, one hundred thirteen million, three hundred thirty-one thousand, three hundred twenty".