22052420 has 48 divisors (see below), whose sum is σ = 50485680. Its totient is φ = 8042496.

The previous prime is 22052347. The next prime is 22052431. The reversal of 22052420 is 2425022.

It can be written as a sum of positive squares in 8 ways, for example, as 4596736 + 17455684 = 2144^2 + 4178^2 .

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 22664 + ... + 23616.

It is an arithmetic number, because the mean of its divisors is an integer number (1051785).

Almost surely, 2^22052420 is an apocalyptic number.

22052420 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 22052420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25242840).

22052420 is an abundant number, since it is smaller than the sum of its proper divisors (28433260).

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

22052420 is a wasteful number, since it uses less digits than its factorization.

22052420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1064 (or 1062 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 22052420 is about 4696.0004258944. Note that the first 3 decimals coincide. The cubic root of 22052420 is about 280.4263063917.

Adding to 22052420 its reverse (2425022), we get a palindrome (24477442).

It can be divided in two parts, 2205 and 2420, that multiplied together give a square (5336100 = 2310²).

The spelling of 22052420 in words is "twenty-two million, fifty-two thousand, four hundred twenty".