21342326 has 8 divisors (see below), whose sum is σ = 32179944. Its totient is φ = 10615680.

The previous prime is 21342311. The next prime is 21342329. The reversal of 21342326 is 62324312.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21342329) 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, 27260 + ... + 28031.

It is an arithmetic number, because the mean of its divisors is an integer number (4022493).

Almost surely, 2^21342326 is an apocalyptic number.

21342326 is a deficient number, since it is larger than the sum of its proper divisors (10837618).

21342326 is a wasteful number, since it uses less digits than its factorization.

21342326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55486.

The product of its digits is 1728, while the sum is 23.

The square root of 21342326 is about 4619.7755356727. The cubic root of 21342326 is about 277.3834740585.

Adding to 21342326 its reverse (62324312), we get a palindrome (83666638).

The spelling of 21342326 in words is "twenty-one million, three hundred forty-two thousand, three hundred twenty-six".