21445202 has 8 divisors (see below), whose sum is σ = 32713200. Its totient is φ = 10540804.

The previous prime is 21445201. The next prime is 21445217. The reversal of 21445202 is 20254412.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21445201) 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, 90752 + ... + 90987.

It is an arithmetic number, because the mean of its divisors is an integer number (4089150).

Almost surely, 2^21445202 is an apocalyptic number.

21445202 is a deficient number, since it is larger than the sum of its proper divisors (11267998).

21445202 is a wasteful number, since it uses less digits than its factorization.

21445202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181800.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 21445202 is about 4630.8964574907. The cubic root of 21445202 is about 277.8284485815.

Adding to 21445202 its reverse (20254412), we get a palindrome (41699614).

The spelling of 21445202 in words is "twenty-one million, four hundred forty-five thousand, two hundred two".