21342300 has 72 divisors (see below), whose sum is σ = 70578816. Its totient is φ = 4877760.

The previous prime is 21342287. The next prime is 21342311. The reversal of 21342300 is 324312.

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 21342300.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2982 + ... + 7181.

Almost surely, 2^21342300 is an apocalyptic number.

21342300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21342300 is an abundant number, since it is smaller than the sum of its proper divisors (49236516).

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

21342300 is a wasteful number, since it uses less digits than its factorization.

21342300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10187 (or 10180 counting only the distinct ones).

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

The square root of 21342300 is about 4619.7727216823. The cubic root of 21342300 is about 277.3833614189.

Adding to 21342300 its reverse (324312), we get a palindrome (21666612).

The spelling of 21342300 in words is "twenty-one million, three hundred forty-two thousand, three hundred".