21344002 has 4 divisors (see below), whose sum is σ = 32016006. Its totient is φ = 10672000.

The previous prime is 21343997. The next prime is 21344021. The reversal of 21344002 is 20044312.

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., 14220441 + 7123561 = 3771^2 + 2669^2 .

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 as a sum of consecutive naturals, namely, 5335999 + ... + 5336002.

Almost surely, 2^21344002 is an apocalyptic number.

21344002 is a deficient number, since it is larger than the sum of its proper divisors (10672004).

21344002 is a wasteful number, since it uses less digits than its factorization.

21344002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10672003.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 21344002 is about 4619.9569262061. The cubic root of 21344002 is about 277.3907347875.

Adding to 21344002 its reverse (20044312), we get a palindrome (41388314).

The spelling of 21344002 in words is "twenty-one million, three hundred forty-four thousand, two".