22404321 has 12 divisors (see below), whose sum is σ = 32772480. Its totient is φ = 14746680.

The previous prime is 22404307. The next prime is 22404329. The reversal of 22404321 is 12340422.

It is not a de Polignac number, because 22404321 - 2⁹ = 22403809 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22404294 and 22404303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22404329) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15045 + ... + 16466.

It is an arithmetic number, because the mean of its divisors is an integer number (2731040).

Almost surely, 2^22404321 is an apocalyptic number.

It is an amenable number.

22404321 is a deficient number, since it is larger than the sum of its proper divisors (10368159).

22404321 is a wasteful number, since it uses less digits than its factorization.

22404321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31596 (or 31593 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 22404321 is about 4733.3202934093. The cubic root of 22404321 is about 281.9100739374.

Adding to 22404321 its reverse (12340422), we get a palindrome (34744743).

It can be divided in two parts, 2240 and 4321, that added together give a 8-th power (6561 = 3⁸).

The spelling of 22404321 in words is "twenty-two million, four hundred four thousand, three hundred twenty-one".