22071204 has 81 divisors (see below), whose sum is σ = 60000577. Its totient is φ = 7103376.

The previous prime is 22071193. The next prime is 22071209. The reversal of 22071204 is 40217022.

The square root of 22071204 is 4698.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 11573604 + 10497600 = 3402^2 + 3240^2 .

It is a tau number, because it is divible by the number of its divisors (81).

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22071209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 761062 + ... + 761090.

Almost surely, 2^22071204 is an apocalyptic number.

22071204 is the 4698-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22071204

22071204 is an abundant number, since it is smaller than the sum of its proper divisors (37929373).

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

22071204 is an frugal number, since it uses more digits than its factorization.

22071204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86 (or 34 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The cubic root of 22071204 is about 280.5059051060.

Adding to 22071204 its reverse (40217022), we get a palindrome (62288226).

The spelling of 22071204 in words is "twenty-two million, seventy-one thousand, two hundred four".