21984002 has 8 divisors (see below), whose sum is σ = 33001212. Its totient is φ = 10983600.

The previous prime is 21983999. The next prime is 21984073. The reversal of 21984002 is 20048912.

It can be written as a sum of positive squares in 2 ways, for example, as 21724921 + 259081 = 4661^2 + 509^2 .

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, 149 + ... + 6632.

Almost surely, 2^21984002 is an apocalyptic number.

21984002 is a deficient number, since it is larger than the sum of its proper divisors (11017210).

21984002 is a wasteful number, since it uses less digits than its factorization.

21984002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8404.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 21984002 is about 4688.7100571479. The cubic root of 21984002 is about 280.1359968604.

The spelling of 21984002 in words is "twenty-one million, nine hundred eighty-four thousand, two".