21282452800 has 84 divisors (see below), whose sum is σ = 59849329120. Its totient is φ = 7296837120.

The previous prime is 21282452773. The next prime is 21282452837. The reversal of 21282452800 is 825428212.

It is a congruent 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, 938910 + ... + 961309.

Almost surely, 2^21282452800 is an apocalyptic number.

21282452800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21282452800 is an abundant number, since it is smaller than the sum of its proper divisors (38566876320).

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

21282452800 is a wasteful number, since it uses less digits than its factorization.

21282452800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1900248 (or 1900233 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 34.

The spelling of 21282452800 in words is "twenty-one billion, two hundred eighty-two million, four hundred fifty-two thousand, eight hundred".