21333722 has 8 divisors (see below), whose sum is σ = 32284116. Its totient is φ = 10572352.

The previous prime is 21333707. The next prime is 21333727. The reversal of 21333722 is 22733312.

It can be written as a sum of positive squares in 2 ways, for example, as 18054001 + 3279721 = 4249^2 + 1811^2 .

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 (21333727) 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, 46973 + ... + 47424.

Almost surely, 2^21333722 is an apocalyptic number.

21333722 is a deficient number, since it is larger than the sum of its proper divisors (10950394).

21333722 is a wasteful number, since it uses less digits than its factorization.

21333722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94512.

The product of its digits is 1512, while the sum is 23.

The square root of 21333722 is about 4618.8442277262. The cubic root of 21333722 is about 277.3461940201.

The spelling of 21333722 in words is "twenty-one million, three hundred thirty-three thousand, seven hundred twenty-two".