21202364 has 12 divisors (see below), whose sum is σ = 38383800. Its totient is φ = 10235568.

The previous prime is 21202283. The next prime is 21202367. The reversal of 21202364 is 46320212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202367) 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, 91274 + ... + 91505.

It is an arithmetic number, because the mean of its divisors is an integer number (3198650).

Almost surely, 2^21202364 is an apocalyptic number.

It is an amenable number.

21202364 is a deficient number, since it is larger than the sum of its proper divisors (17181436).

21202364 is a wasteful number, since it uses less digits than its factorization.

21202364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182812 (or 182810 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 21202364 is about 4604.6024801279. The cubic root of 21202364 is about 276.7757876680.

Adding to 21202364 its reverse (46320212), we get a palindrome (67522576).

The spelling of 21202364 in words is "twenty-one million, two hundred two thousand, three hundred sixty-four".