21332002 has 4 divisors (see below), whose sum is σ = 31998006. Its totient is φ = 10666000.

The previous prime is 21331993. The next prime is 21332009. The reversal of 21332002 is 20023312.

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., 11162281 + 10169721 = 3341^2 + 3189^2 .

It is not an unprimeable number, because it can be changed into a prime (21332009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5332999 + ... + 5333002.

Almost surely, 2^21332002 is an apocalyptic number.

21332002 is a deficient number, since it is larger than the sum of its proper divisors (10666004).

21332002 is a wasteful number, since it uses less digits than its factorization.

21332002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10666003.

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

The square root of 21332002 is about 4618.6580302075. The cubic root of 21332002 is about 277.3387402766.

Adding to 21332002 its reverse (20023312), we get a palindrome (41355314).

The spelling of 21332002 in words is "twenty-one million, three hundred thirty-two thousand, two".