20113221300 has 72 divisors (see below), whose sum is σ = 58401595392. Its totient is φ = 5344416000.

The previous prime is 20113221299. The next prime is 20113221341. The reversal of 20113221300 is 312231102.

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 20113221300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34996 + ... + 203595.

Almost surely, 2^20113221300 is an apocalyptic number.

20113221300 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 20113221300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29200797696).

20113221300 is an abundant number, since it is smaller than the sum of its proper divisors (38288374092).

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

20113221300 is a wasteful number, since it uses less digits than its factorization.

20113221300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238889 (or 238882 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20113221300 its reverse (312231102), we get a palindrome (20425452402).

The spelling of 20113221300 in words is "twenty billion, one hundred thirteen million, two hundred twenty-one thousand, three hundred".