22324821 has 4 divisors (see below), whose sum is σ = 29766432. Its totient is φ = 14883212.

The previous prime is 22324817. The next prime is 22324823. The reversal of 22324821 is 12842322.

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 22324821 - 2² = 22324817 is a prime.

It is a super-3 number, since 3×22324821³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22324791 and 22324800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22324823) 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, 3720801 + ... + 3720806.

It is an arithmetic number, because the mean of its divisors is an integer number (7441608).

Almost surely, 2^22324821 is an apocalyptic number.

It is an amenable number.

22324821 is a deficient number, since it is larger than the sum of its proper divisors (7441611).

22324821 is an equidigital number, since it uses as much as digits as its factorization.

22324821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7441610.

The product of its digits is 1536, while the sum is 24.

The square root of 22324821 is about 4724.9149198689. The cubic root of 22324821 is about 281.5762333928.

The spelling of 22324821 in words is "twenty-two million, three hundred twenty-four thousand, eight hundred twenty-one".