22321404 has 72 divisors (see below), whose sum is σ = 65196768. Its totient is φ = 6307200.

The previous prime is 22321399. The next prime is 22321421. The reversal of 22321404 is 40412322.

It is a super-3 number, since 3×22321404³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25014 + ... + 25890.

Almost surely, 2^22321404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22321404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32598384).

22321404 is an abundant number, since it is smaller than the sum of its proper divisors (42875364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22321404 is a wasteful number, since it uses less digits than its factorization.

22321404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 995 (or 990 counting only the distinct ones).

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

The square root of 22321404 is about 4724.5533122191. The cubic root of 22321404 is about 281.5618667964.

Adding to 22321404 its reverse (40412322), we get a palindrome (62733726).

The spelling of 22321404 in words is "twenty-two million, three hundred twenty-one thousand, four hundred four".