21304202 has 8 divisors (see below), whose sum is σ = 32010276. Its totient is φ = 10634112.

The previous prime is 21304147. The next prime is 21304219. The reversal of 21304202 is 20240312.

It can be written as a sum of positive squares in 2 ways, for example, as 13845841 + 7458361 = 3721^2 + 2731^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7463 + ... + 9914.

Almost surely, 2^21304202 is an apocalyptic number.

21304202 is a deficient number, since it is larger than the sum of its proper divisors (10706074).

21304202 is a wasteful number, since it uses less digits than its factorization.

21304202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17992.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 21304202 is about 4615.6475168713. The cubic root of 21304202 is about 277.2182113697.

Adding to 21304202 its reverse (20240312), we get a palindrome (41544514).

The spelling of 21304202 in words is "twenty-one million, three hundred four thousand, two hundred two".