21422303 has 4 divisors (see below), whose sum is σ = 24482640. Its totient is φ = 18361968.

The previous prime is 21422273. The next prime is 21422321. The reversal of 21422303 is 30322412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21422303 - 2¹² = 21418207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21422803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1530158 + ... + 1530171.

It is an arithmetic number, because the mean of its divisors is an integer number (6120660).

Almost surely, 2^21422303 is an apocalyptic number.

21422303 is a deficient number, since it is larger than the sum of its proper divisors (3060337).

21422303 is an equidigital number, since it uses as much as digits as its factorization.

21422303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3060336.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 21422303 is about 4628.4233816711. The cubic root of 21422303 is about 277.7295257639.

Adding to 21422303 its reverse (30322412), we get a palindrome (51744715).

The spelling of 21422303 in words is "twenty-one million, four hundred twenty-two thousand, three hundred three".