21633002 has 4 divisors (see below), whose sum is σ = 32449506. Its totient is φ = 10816500.

The previous prime is 21632983. The next prime is 21633011. The reversal of 21633002 is 20033612.

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., 18913801 + 2719201 = 4349^2 + 1649^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5408249 + ... + 5408252.

Almost surely, 2^21633002 is an apocalyptic number.

21633002 is a deficient number, since it is larger than the sum of its proper divisors (10816504).

21633002 is a wasteful number, since it uses less digits than its factorization.

21633002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10816503.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 21633002 is about 4651.1291102269. The cubic root of 21633002 is about 278.6370927639.

Adding to 21633002 its reverse (20033612), we get a palindrome (41666614).

The spelling of 21633002 in words is "twenty-one million, six hundred thirty-three thousand, two".