22204620 has 72 divisors (see below), whose sum is σ = 67747680. Its totient is φ = 5886720.

The previous prime is 22204583. The next prime is 22204621. The reversal of 22204620 is 2640222.

22204620 = T₂₆₃ + T₂₆₄ + ... + T₅₃₂.

It is a happy number.

22204620 is a `hidden beast` number, since 22 + 20 + 4 + 620 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 22204593 and 22204602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22204621) 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 23 ways as a sum of consecutive naturals, for example, 50361 + ... + 50799.

It is an arithmetic number, because the mean of its divisors is an integer number (940940).

Almost surely, 2^22204620 is an apocalyptic number.

22204620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22204620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33873840).

22204620 is an abundant number, since it is smaller than the sum of its proper divisors (45543060).

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

22204620 is a wasteful number, since it uses less digits than its factorization.

22204620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735 (or 730 counting only the distinct ones).

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

The square root of 22204620 is about 4712.1778404470. The cubic root of 22204620 is about 281.0699707130.

Adding to 22204620 its reverse (2640222), we get a palindrome (24844842).

The spelling of 22204620 in words is "twenty-two million, two hundred four thousand, six hundred twenty".