21342200 has 96 divisors (see below), whose sum is σ = 55242000. Its totient is φ = 7603200.

The previous prime is 21342193. The next prime is 21342203. The reversal of 21342200 is 224312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21342203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 195746 + ... + 195854.

Almost surely, 2^21342200 is an apocalyptic number.

21342200 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 21342200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27621000).

21342200 is an abundant number, since it is smaller than the sum of its proper divisors (33899800).

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

21342200 is a wasteful number, since it uses less digits than its factorization.

21342200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225 (or 216 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 21342200 is about 4619.7618986264. The cubic root of 21342200 is about 277.3829281888.

Adding to 21342200 its reverse (224312), we get a palindrome (21566512).

It can be divided in two parts, 2134 and 2200, that added together give a palindrome (4334).

The spelling of 21342200 in words is "twenty-one million, three hundred forty-two thousand, two hundred".