21360604 has 6 divisors (see below), whose sum is σ = 37381064. Its totient is φ = 10680300.

The previous prime is 21360601. The next prime is 21360641. The reversal of 21360604 is 40606312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21360601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2670072 + ... + 2670079.

Almost surely, 2^21360604 is an apocalyptic number.

It is an amenable number.

21360604 is a deficient number, since it is larger than the sum of its proper divisors (16020460).

21360604 is a wasteful number, since it uses less digits than its factorization.

21360604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5340155 (or 5340153 counting only the distinct ones).

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

The square root of 21360604 is about 4621.7533469453. The cubic root of 21360604 is about 277.4626370712.

Adding to 21360604 its reverse (40606312), we get a palindrome (61966916).

The spelling of 21360604 in words is "twenty-one million, three hundred sixty thousand, six hundred four".