21144302 has 16 divisors (see below), whose sum is σ = 33955200. Its totient is φ = 9844920.

The previous prime is 21144301. The next prime is 21144307. The reversal of 21144302 is 20344112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21144301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2474 + ... + 6957.

It is an arithmetic number, because the mean of its divisors is an integer number (2122200).

Almost surely, 2^21144302 is an apocalyptic number.

21144302 is a deficient number, since it is larger than the sum of its proper divisors (12810898).

21144302 is a wasteful number, since it uses less digits than its factorization.

21144302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9511.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 21144302 is about 4598.2933790701. The cubic root of 21144302 is about 276.5229094615.

Adding to 21144302 its reverse (20344112), we get a palindrome (41488414).

The spelling of 21144302 in words is "twenty-one million, one hundred forty-four thousand, three hundred two".