21633314 has 4 divisors (see below), whose sum is σ = 32449974. Its totient is φ = 10816656.

The previous prime is 21633289. The next prime is 21633329. The reversal of 21633314 is 41333612.

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., 20566225 + 1067089 = 4535^2 + 1033^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21633314.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5408327 + ... + 5408330.

Almost surely, 2^21633314 is an apocalyptic number.

21633314 is a deficient number, since it is larger than the sum of its proper divisors (10816660).

21633314 is a wasteful number, since it uses less digits than its factorization.

21633314 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10816659.

The product of its digits is 1296, while the sum is 23.

The square root of 21633314 is about 4651.1626503488. The cubic root of 21633314 is about 278.6384322968.

Adding to 21633314 its reverse (41333612), we get a palindrome (62966926).

The spelling of 21633314 in words is "twenty-one million, six hundred thirty-three thousand, three hundred fourteen".