21322023 has 8 divisors (see below), whose sum is σ = 29090688. Its totient is φ = 13884024.

The previous prime is 21322019. The next prime is 21322031. The reversal of 21322023 is 32022312.

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

It is not a de Polignac number, because 21322023 - 2² = 21322019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21321993 and 21322011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21322003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82515 + ... + 82772.

It is an arithmetic number, because the mean of its divisors is an integer number (3636336).

Almost surely, 2^21322023 is an apocalyptic number.

21322023 is a deficient number, since it is larger than the sum of its proper divisors (7768665).

21322023 is a wasteful number, since it uses less digits than its factorization.

21322023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165333.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 21322023 is about 4617.5776116921. The cubic root of 21322023 is about 277.2954876563.

Adding to 21322023 its reverse (32022312), we get a palindrome (53344335).

The spelling of 21322023 in words is "twenty-one million, three hundred twenty-two thousand, twenty-three".