21322343 has 8 divisors (see below), whose sum is σ = 24504480. Its totient is φ = 18174240.

The previous prime is 21322331. The next prime is 21322361. The reversal of 21322343 is 34322312.

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

It is not a de Polignac number, because 21322343 - 2¹⁸ = 21060199 is a prime.

It is a super-2 number, since 2×21322343² = 909284622019298, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21322043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7148 + ... + 9681.

It is an arithmetic number, because the mean of its divisors is an integer number (3063060).

Almost surely, 2^21322343 is an apocalyptic number.

21322343 is a deficient number, since it is larger than the sum of its proper divisors (3182137).

21322343 is a wasteful number, since it uses less digits than its factorization.

21322343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17017.

The product of its digits is 864, while the sum is 20.

The square root of 21322343 is about 4617.6122617647. The cubic root of 21322343 is about 277.2968748622.

Adding to 21322343 its reverse (34322312), we get a palindrome (55644655).

The spelling of 21322343 in words is "twenty-one million, three hundred twenty-two thousand, three hundred forty-three".