21380447300 has 36 divisors (see below), whose sum is σ = 48837447120. Its totient is φ = 8102063520.

The previous prime is 21380447191. The next prime is 21380447303. The reversal of 21380447300 is 374408312.

It is not an unprimeable number, because it can be changed into a prime (21380447303) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5624534 + ... + 5628333.

Almost surely, 2^21380447300 is an apocalyptic number.

21380447300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21380447300 is an abundant number, since it is smaller than the sum of its proper divisors (27456999820).

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

21380447300 is a wasteful number, since it uses less digits than its factorization.

21380447300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11252900 (or 11252893 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The spelling of 21380447300 in words is "twenty-one billion, three hundred eighty million, four hundred forty-seven thousand, three hundred".