21600364 has 6 divisors (see below), whose sum is σ = 37800644. Its totient is φ = 10800180.

The previous prime is 21600361. The next prime is 21600391. The reversal of 21600364 is 46300612.

It is not an unprimeable number, because it can be changed into a prime (21600361) by changing a digit.

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 as a sum of consecutive naturals, namely, 2700042 + ... + 2700049.

Almost surely, 2^21600364 is an apocalyptic number.

It is an amenable number.

21600364 is a deficient number, since it is larger than the sum of its proper divisors (16200280).

21600364 is a wasteful number, since it uses less digits than its factorization.

21600364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5400095 (or 5400093 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 21600364 is about 4647.6191754489. The cubic root of 21600364 is about 278.4968943953.

Adding to 21600364 its reverse (46300612), we get a palindrome (67900976).

The spelling of 21600364 in words is "twenty-one million, six hundred thousand, three hundred sixty-four".