21322003200 has 108 divisors (see below), whose sum is σ = 70367116008. Its totient is φ = 5685862400.

The previous prime is 21322003193. The next prime is 21322003223. The reversal of 21322003200 is 230022312.

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 21322003200.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 536061 + ... + 574460.

Almost surely, 2^21322003200 is an apocalyptic number.

21322003200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21322003200 is an abundant number, since it is smaller than the sum of its proper divisors (49045112808).

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

21322003200 is a wasteful number, since it uses less digits than its factorization.

21322003200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110550 (or 1110531 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

Adding to 21322003200 its reverse (230022312), we get a palindrome (21552025512).

The spelling of 21322003200 in words is "twenty-one billion, three hundred twenty-two million, three thousand, two hundred".