21342360 has 64 divisors (see below), whose sum is σ = 68957280. Its totient is φ = 5253120.

The previous prime is 21342359. The next prime is 21342379. The reversal of 21342360 is 6324312.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5281 + ... + 8400.

Almost surely, 2^21342360 is an apocalyptic number.

21342360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21342360 is an abundant number, since it is smaller than the sum of its proper divisors (47614920).

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

21342360 is a wasteful number, since it uses less digits than its factorization.

21342360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13708 (or 13704 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 21342360 is about 4619.7792155037. The cubic root of 21342360 is about 277.3836213563.

Adding to 21342360 its reverse (6324312), we get a palindrome (27666672).

The spelling of 21342360 in words is "twenty-one million, three hundred forty-two thousand, three hundred sixty".