21303300400 has 60 divisors (see below), whose sum is σ = 51226012744. Its totient is φ = 8513856000.

The previous prime is 21303300311. The next prime is 21303300401. The reversal of 21303300400 is 400330312.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (21303300401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 445660 + ... + 491140.

Almost surely, 2^21303300400 is an apocalyptic number.

21303300400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21303300400 is an abundant number, since it is smaller than the sum of its proper divisors (29922712344).

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

21303300400 is a wasteful number, since it uses less digits than its factorization.

21303300400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46670 (or 46659 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 16.

Adding to 21303300400 its reverse (400330312), we get a palindrome (21703630712).

The spelling of 21303300400 in words is "twenty-one billion, three hundred three million, three hundred thousand, four hundred".