21600452 has 12 divisors (see below), whose sum is σ = 38822700. Its totient is φ = 10508256.

The previous prime is 21600451. The next prime is 21600463. The reversal of 21600452 is 25400612.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20921476 + 678976 = 4574^2 + 824^2 .

It is not an unprimeable number, because it can be changed into a prime (21600451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72827 + ... + 73122.

It is an arithmetic number, because the mean of its divisors is an integer number (3235225).

Almost surely, 2^21600452 is an apocalyptic number.

It is an amenable number.

21600452 is a deficient number, since it is larger than the sum of its proper divisors (17222248).

21600452 is a wasteful number, since it uses less digits than its factorization.

21600452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145990 (or 145988 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 21600452 is about 4647.6286426521. The cubic root of 21600452 is about 278.4972725941.

The spelling of 21600452 in words is "twenty-one million, six hundred thousand, four hundred fifty-two".