21103032300 has 144 divisors (see below), whose sum is σ = 70089680640. Its totient is φ = 4802192640.

The previous prime is 21103032259. The next prime is 21103032311. The reversal of 21103032300 is 323030112.

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 21103032300.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 454566 + ... + 498834.

Almost surely, 2^21103032300 is an apocalyptic number.

21103032300 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 21103032300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35044840320).

21103032300 is an abundant number, since it is smaller than the sum of its proper divisors (48986648340).

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

21103032300 is a wasteful number, since it uses less digits than its factorization.

21103032300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44520 (or 44513 counting only the distinct ones).

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

Adding to 21103032300 its reverse (323030112), we get a palindrome (21426062412).

The spelling of 21103032300 in words is "twenty-one billion, one hundred three million, thirty-two thousand, three hundred".