21322354 has 4 divisors (see below), whose sum is σ = 31983534. Its totient is φ = 10661176.

The previous prime is 21322331. The next prime is 21322361. The reversal of 21322354 is 45322312.

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

It can be written as a sum of positive squares in only one way, i.e., 13068225 + 8254129 = 3615^2 + 2873^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5330587 + ... + 5330590.

Almost surely, 2^21322354 is an apocalyptic number.

21322354 is a deficient number, since it is larger than the sum of its proper divisors (10661180).

21322354 is a wasteful number, since it uses less digits than its factorization.

21322354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10661179.

The product of its digits is 1440, while the sum is 22.

The square root of 21322354 is about 4617.6134528564. The cubic root of 21322354 is about 277.2969225472.

Adding to 21322354 its reverse (45322312), we get a palindrome (66644666).

The spelling of 21322354 in words is "twenty-one million, three hundred twenty-two thousand, three hundred fifty-four".