20013130320 has 80 divisors (see below), whose sum is σ = 65690170560. Its totient is φ = 5022902272.

The previous prime is 20013130273. The next prime is 20013130351. The reversal of 20013130320 is 2303131002.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20013130320.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2448510 + ... + 2456669.

It is an arithmetic number, because the mean of its divisors is an integer number (821127132).

Almost surely, 2^20013130320 is an apocalyptic number.

20013130320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20013130320 is an abundant number, since it is smaller than the sum of its proper divisors (45677040240).

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

20013130320 is a wasteful number, since it uses less digits than its factorization.

20013130320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4905212 (or 4905206 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 20013130320 its reverse (2303131002), we get a palindrome (22316261322).

The spelling of 20013130320 in words is "twenty billion, thirteen million, one hundred thirty thousand, three hundred twenty".