22821204 has 96 divisors (see below), whose sum is σ = 65228800. Its totient is φ = 6065280.

The previous prime is 22821203. The next prime is 22821229. The reversal of 22821204 is 40212822.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22821203) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 125994 + ... + 126174.

Almost surely, 2^22821204 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 22821204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32614400).

22821204 is an abundant number, since it is smaller than the sum of its proper divisors (42407596).

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

22821204 is a wasteful number, since it uses less digits than its factorization.

22821204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293 (or 291 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 22821204 is about 4777.1543831030. The cubic root of 22821204 is about 283.6478641637.

It can be divided in two parts, 2282 and 1204, that added together give a triangular number (3486 = T₈₃).

The spelling of 22821204 in words is "twenty-two million, eight hundred twenty-one thousand, two hundred four".