21333274 has 8 divisors (see below), whose sum is σ = 32019840. Its totient is φ = 10659996.

The previous prime is 21333271. The next prime is 21333329. The reversal of 21333274 is 47233312.

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

It is not an unprimeable number, because it can be changed into a prime (21333271) 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, 3477 + ... + 7399.

It is an arithmetic number, because the mean of its divisors is an integer number (4002480).

Almost surely, 2^21333274 is an apocalyptic number.

21333274 is a deficient number, since it is larger than the sum of its proper divisors (10686566).

21333274 is a wasteful number, since it uses less digits than its factorization.

21333274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6644.

The product of its digits is 3024, while the sum is 25.

The square root of 21333274 is about 4618.7957304908. The cubic root of 21333274 is about 277.3442526185.

Adding to 21333274 its reverse (47233312), we get a palindrome (68566586).

The spelling of 21333274 in words is "twenty-one million, three hundred thirty-three thousand, two hundred seventy-four".