21300442112 has 44 divisors (see below), whose sum is σ = 43486140480. Its totient is φ = 10423597056.

The previous prime is 21300442109. The next prime is 21300442123. The reversal of 21300442112 is 21124400312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173162 + ... + 269417.

Almost surely, 2^21300442112 is an apocalyptic number.

It is an amenable number.

21300442112 is an abundant number, since it is smaller than the sum of its proper divisors (22185698368).

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

21300442112 is an equidigital number, since it uses as much as digits as its factorization.

21300442112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442646 (or 442628 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21300442112 its reverse (21124400312), we get a palindrome (42424842424).

The spelling of 21300442112 in words is "twenty-one billion, three hundred million, four hundred forty-two thousand, one hundred twelve".