21412200 has 96 divisors (see below), whose sum is σ = 67138560. Its totient is φ = 5644800.

The previous prime is 21412189. The next prime is 21412217. The reversal of 21412200 is 221412.

It is a Harshad number since it is a multiple of its sum of digits (12).

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, 76060 + ... + 76340.

It is an arithmetic number, because the mean of its divisors is an integer number (699360).

Almost surely, 2^21412200 is an apocalyptic number.

21412200 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 21412200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33569280).

21412200 is an abundant number, since it is smaller than the sum of its proper divisors (45726360).

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

21412200 is a wasteful number, since it uses less digits than its factorization.

21412200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427 (or 418 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 21412200 is about 4627.3318445947. The cubic root of 21412200 is about 277.6858587718.

Adding to 21412200 its reverse (221412), we get a palindrome (21633612).

It can be divided in two parts, 21412 and 200, that added together give a palindrome (21612).

The spelling of 21412200 in words is "twenty-one million, four hundred twelve thousand, two hundred".