21243420300 has 36 divisors (see below), whose sum is σ = 61464296936. Its totient is φ = 5664912000.

The previous prime is 21243420277. The next prime is 21243420329. The reversal of 21243420300 is 302434212.

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, 35405401 + ... + 35406000.

Almost surely, 2^21243420300 is an apocalyptic number.

21243420300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21243420300 is an abundant number, since it is smaller than the sum of its proper divisors (40220876636).

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

21243420300 is a wasteful number, since it uses less digits than its factorization.

21243420300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70811418 (or 70811411 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 21243420300 its reverse (302434212), we get a palindrome (21545854512).

The spelling of 21243420300 in words is "twenty-one billion, two hundred forty-three million, four hundred twenty thousand, three hundred".