21044424300 has 36 divisors (see below), whose sum is σ = 60888535176. Its totient is φ = 5611846400.

The previous prime is 21044424257. The next prime is 21044424311. The reversal of 21044424300 is 342444012.

It is a happy number.

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, 35073741 + ... + 35074340.

Almost surely, 2^21044424300 is an apocalyptic number.

21044424300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21044424300 is an abundant number, since it is smaller than the sum of its proper divisors (39844110876).

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

21044424300 is a wasteful number, since it uses less digits than its factorization.

21044424300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70148098 (or 70148091 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 21044424300 its reverse (342444012), we get a palindrome (21386868312).

The spelling of 21044424300 in words is "twenty-one billion, forty-four million, four hundred twenty-four thousand, three hundred".