21250533300 has 72 divisors (see below), whose sum is σ = 61724341056. Its totient is φ = 5644738560.

The previous prime is 21250533281. The next prime is 21250533323. The reversal of 21250533300 is 333505212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60712 + ... + 214911.

Almost surely, 2^21250533300 is an apocalyptic number.

21250533300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21250533300 is an abundant number, since it is smaller than the sum of its proper divisors (40473807756).

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

21250533300 is a wasteful number, since it uses less digits than its factorization.

21250533300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275897 (or 275890 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 24.

The spelling of 21250533300 in words is "twenty-one billion, two hundred fifty million, five hundred thirty-three thousand, three hundred".