22020040 has 32 divisors (see below), whose sum is σ = 56623680. Its totient is φ = 7549632.

The previous prime is 22020029. The next prime is 22020059. The reversal of 22020040 is 4002022.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 22019999 and 22020026.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39042 + ... + 39601.

It is an arithmetic number, because the mean of its divisors is an integer number (1769490).

Almost surely, 2^22020040 is an apocalyptic number.

22020040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22020040 is an abundant number, since it is smaller than the sum of its proper divisors (34603640).

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

22020040 is a wasteful number, since it uses less digits than its factorization.

22020040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78661 (or 78657 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 10.

The square root of 22020040 is about 4692.5515447356. The cubic root of 22020040 is about 280.2889873485.

Adding to 22020040 its reverse (4002022), we get a palindrome (26022062).

The spelling of 22020040 in words is "twenty-two million, twenty thousand, forty".