20222004 has 72 divisors (see below), whose sum is σ = 54668320. Its totient is φ = 5797440.

The previous prime is 20222003. The next prime is 20222011. The reversal of 20222004 is 40022202.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20222003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27222 + ... + 27954.

Almost surely, 2^20222004 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 20222004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27334160).

20222004 is an abundant number, since it is smaller than the sum of its proper divisors (34446316).

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

20222004 is a wasteful number, since it uses less digits than its factorization.

20222004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781 (or 768 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 12.

The square root of 20222004 is about 4496.8882574509. Note that the first 3 decimals coincide. The cubic root of 20222004 is about 272.4424208507.

Adding to 20222004 its reverse (40022202), we get a palindrome (60244206).

The spelling of 20222004 in words is "twenty million, two hundred twenty-two thousand, four".