21836002 has 8 divisors (see below), whose sum is σ = 33515856. Its totient is φ = 10664052.

The previous prime is 21835981. The next prime is 21836011. The reversal of 21836002 is 20063812.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126868 + ... + 127039.

It is an arithmetic number, because the mean of its divisors is an integer number (4189482).

Almost surely, 2^21836002 is an apocalyptic number.

21836002 is a deficient number, since it is larger than the sum of its proper divisors (11679854).

21836002 is a wasteful number, since it uses less digits than its factorization.

21836002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253952.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 21836002 is about 4672.9008121294. The cubic root of 21836002 is about 279.5059399683.

Adding to 21836002 its reverse (20063812), we get a palindrome (41899814).

The spelling of 21836002 in words is "twenty-one million, eight hundred thirty-six thousand, two".