21013232300 has 18 divisors (see below), whose sum is σ = 45598714308. Its totient is φ = 8405292880.

The previous prime is 21013232299. The next prime is 21013232309. The reversal of 21013232300 is 323231012.

It is not an unprimeable number, because it can be changed into a prime (21013232309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 105066062 + ... + 105066261.

It is an arithmetic number, because the mean of its divisors is an integer number (2533261906).

Almost surely, 2^21013232300 is an apocalyptic number.

21013232300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21013232300 is an abundant number, since it is smaller than the sum of its proper divisors (24585482008).

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

21013232300 is a wasteful number, since it uses less digits than its factorization.

21013232300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210132337 (or 210132330 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21013232300 its reverse (323231012), we get a palindrome (21336463312).

The spelling of 21013232300 in words is "twenty-one billion, thirteen million, two hundred thirty-two thousand, three hundred".