21243031300 has 36 divisors (see below), whose sum is σ = 46103854720. Its totient is φ = 8496018720.

The previous prime is 21243031267. The next prime is 21243031319. The reversal of 21243031300 is 313034212.

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, 1162837 + ... + 1180963.

Almost surely, 2^21243031300 is an apocalyptic number.

21243031300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21243031300 is an abundant number, since it is smaller than the sum of its proper divisors (24860823420).

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

21243031300 is a wasteful number, since it uses less digits than its factorization.

21243031300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29860 (or 29853 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21243031300 its reverse (313034212), we get a palindrome (21556065512).

The spelling of 21243031300 in words is "twenty-one billion, two hundred forty-three million, thirty-one thousand, three hundred".