21013424300 has 72 divisors (see below), whose sum is σ = 52362690240. Its totient is φ = 7239067200.

The previous prime is 21013424297. The next prime is 21013424309. The reversal of 21013424300 is 342431012.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (21013424309) 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 23 ways as a sum of consecutive naturals, for example, 481814 + ... + 523613.

Almost surely, 2^21013424300 is an apocalyptic number.

21013424300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21013424300 is an abundant number, since it is smaller than the sum of its proper divisors (31349265940).

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

21013424300 is a wasteful number, since it uses less digits than its factorization.

21013424300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005471 (or 1005464 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21013424300 its reverse (342431012), we get a palindrome (21355855312).

The spelling of 21013424300 in words is "twenty-one billion, thirteen million, four hundred twenty-four thousand, three hundred".