21330202 has 4 divisors (see below), whose sum is σ = 31995306. Its totient is φ = 10665100.

The previous prime is 21330163. The next prime is 21330251. The reversal of 21330202 is 20203312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12680721 + 8649481 = 3561^2 + 2941^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5332549 + ... + 5332552.

Almost surely, 2^21330202 is an apocalyptic number.

21330202 is a deficient number, since it is larger than the sum of its proper divisors (10665104).

21330202 is a wasteful number, since it uses less digits than its factorization.

21330202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10665103.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 21330202 is about 4618.4631643004. The cubic root of 21330202 is about 277.3309394183.

Adding to 21330202 its reverse (20203312), we get a palindrome (41533514).

The spelling of 21330202 in words is "twenty-one million, three hundred thirty thousand, two hundred two".