22020240 has 160 divisors (see below), whose sum is σ = 78566400. Its totient is φ = 5045760.

The previous prime is 22020227. The next prime is 22020277. The reversal of 22020240 is 4202022.

It is a happy number.

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

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49941 + ... + 50379.

It is an arithmetic number, because the mean of its divisors is an integer number (491040).

Almost surely, 2^22020240 is an apocalyptic number.

22020240 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 22020240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39283200).

22020240 is an abundant number, since it is smaller than the sum of its proper divisors (56546160).

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

22020240 is a wasteful number, since it uses less digits than its factorization.

22020240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485 (or 479 counting only the distinct ones).

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

The square root of 22020240 is about 4692.5728550551. The cubic root of 22020240 is about 280.2898359335.

Adding to 22020240 its reverse (4202022), we get a palindrome (26222262).

The spelling of 22020240 in words is "twenty-two million, twenty thousand, two hundred forty".