22326821 has 4 divisors (see below), whose sum is σ = 24356544. Its totient is φ = 20297100.

The previous prime is 22326817. The next prime is 22326827. The reversal of 22326821 is 12862322.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22326821 - 2² = 22326817 is a prime.

It is a super-3 number, since 3×22326821³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22326827) 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, 1014845 + ... + 1014866.

It is an arithmetic number, because the mean of its divisors is an integer number (6089136).

Almost surely, 2^22326821 is an apocalyptic number.

It is an amenable number.

22326821 is a deficient number, since it is larger than the sum of its proper divisors (2029723).

22326821 is a wasteful number, since it uses less digits than its factorization.

22326821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2029722.

The product of its digits is 2304, while the sum is 26.

The square root of 22326821 is about 4725.1265591516. The cubic root of 22326821 is about 281.5846416073.

The spelling of 22326821 in words is "twenty-two million, three hundred twenty-six thousand, eight hundred twenty-one".