21814322 has 16 divisors (see below), whose sum is σ = 33960600. Its totient is φ = 10496640.

The previous prime is 21814321. The next prime is 21814343. The reversal of 21814322 is 22341812.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 18395521 + 3418801 = 4289^2 + 1849^2 .

It is not an unprimeable number, because it can be changed into a prime (21814321) 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, 32672 + ... + 33332.

Almost surely, 2^21814322 is an apocalyptic number.

21814322 is a deficient number, since it is larger than the sum of its proper divisors (12146278).

21814322 is a wasteful number, since it uses less digits than its factorization.

21814322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1261.

The product of its digits is 768, while the sum is 23.

The square root of 21814322 is about 4670.5804778421. The cubic root of 21814322 is about 279.4134063114.

The spelling of 21814322 in words is "twenty-one million, eight hundred fourteen thousand, three hundred twenty-two".