21433323 has 8 divisors (see below), whose sum is σ = 29350288. Its totient is φ = 13902624.

The previous prime is 21433319. The next prime is 21433351. The reversal of 21433323 is 32333412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21433323 - 2² = 21433319 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21433323.

It is not an unprimeable number, because it can be changed into a prime (21433123) 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, 96436 + ... + 96657.

It is an arithmetic number, because the mean of its divisors is an integer number (3668786).

Almost surely, 2^21433323 is an apocalyptic number.

21433323 is a deficient number, since it is larger than the sum of its proper divisors (7916965).

21433323 is a wasteful number, since it uses less digits than its factorization.

21433323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193133.

The product of its digits is 1296, while the sum is 21.

The square root of 21433323 is about 4629.6136987874. The cubic root of 21433323 is about 277.7771405437. Note that the first 3 decimals are identical.

Adding to 21433323 its reverse (32333412), we get a palindrome (53766735).

The spelling of 21433323 in words is "twenty-one million, four hundred thirty-three thousand, three hundred twenty-three".