21343200 has 72 divisors (see below), whose sum is σ = 69479928. Its totient is φ = 5690880.

The previous prime is 21343187. The next prime is 21343243. The reversal of 21343200 is 234312.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21343200.

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, 2047 + ... + 6846.

It is an arithmetic number, because the mean of its divisors is an integer number (964999).

Almost surely, 2^21343200 is an apocalyptic number.

21343200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21343200 is an abundant number, since it is smaller than the sum of its proper divisors (48136728).

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

21343200 is a wasteful number, since it uses less digits than its factorization.

21343200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8916 (or 8903 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 21343200 is about 4619.8701280447. The cubic root of 21343200 is about 277.3872604288.

Adding to 21343200 its reverse (234312), we get a palindrome (21577512).

The spelling of 21343200 in words is "twenty-one million, three hundred forty-three thousand, two hundred".