20130344320 has 128 divisors (see below), whose sum is σ = 49868771040. Its totient is φ = 7764148224.

The previous prime is 20130344261. The next prime is 20130344383. The reversal of 20130344320 is 2344303102.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a junction number, because it is equal to n+sod(n) for n = 20130344291 and 20130344300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2672079 + ... + 2679601.

Almost surely, 2^20130344320 is an apocalyptic number.

20130344320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20130344320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24934385520).

20130344320 is an abundant number, since it is smaller than the sum of its proper divisors (29738426720).

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

20130344320 is a wasteful number, since it uses less digits than its factorization.

20130344320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7692 (or 7680 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 20130344320 its reverse (2344303102), we get a palindrome (22474647422).

The spelling of 20130344320 in words is "twenty billion, one hundred thirty million, three hundred forty-four thousand, three hundred twenty".