21482800 has 60 divisors (see below), whose sum is σ = 52855000. Its totient is φ = 8386560.

The previous prime is 21482789. The next prime is 21482809. The reversal of 21482800 is 828412.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (21482809) 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, 16576 + ... + 17824.

Almost surely, 2^21482800 is an apocalyptic number.

21482800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21482800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26427500).

21482800 is an abundant number, since it is smaller than the sum of its proper divisors (31372200).

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

21482800 is a wasteful number, since it uses less digits than its factorization.

21482800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1310 (or 1299 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 21482800 is about 4634.9541529556. The cubic root of 21482800 is about 277.9907179069.

The spelling of 21482800 in words is "twenty-one million, four hundred eighty-two thousand, eight hundred".