21482400 has 72 divisors (see below), whose sum is σ = 69933024. Its totient is φ = 5728000.

The previous prime is 21482387. The next prime is 21482491. The reversal of 21482400 is 428412.

It is a super-2 number, since 2×21482400² = 922987019520000, which contains 22 as substring.

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, 2076 + ... + 6875.

It is an arithmetic number, because the mean of its divisors is an integer number (971292).

Almost surely, 2^21482400 is an apocalyptic number.

21482400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21482400 is an abundant number, since it is smaller than the sum of its proper divisors (48450624).

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

21482400 is a wasteful number, since it uses less digits than its factorization.

21482400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8974 (or 8961 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 21482400 is about 4634.9110023818. The cubic root of 21482400 is about 277.9889925424.

The spelling of 21482400 in words is "twenty-one million, four hundred eighty-two thousand, four hundred".