22040020 has 12 divisors (see below), whose sum is σ = 46284084. Its totient is φ = 8816000.

The previous prime is 22040009. The next prime is 22040023. The reversal of 22040020 is 2004022.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16941456 + 5098564 = 4116^2 + 2258^2 .

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 = 22039979 and 22040006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22040023) 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 3 ways as a sum of consecutive naturals, for example, 550981 + ... + 551020.

It is an arithmetic number, because the mean of its divisors is an integer number (3857007).

Almost surely, 2^22040020 is an apocalyptic number.

22040020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22040020 is an abundant number, since it is smaller than the sum of its proper divisors (24244064).

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

22040020 is a wasteful number, since it uses less digits than its factorization.

22040020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1102010 (or 1102008 counting only the distinct ones).

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

The square root of 22040020 is about 4694.6799677933. The cubic root of 22040020 is about 280.3737356208.

Adding to 22040020 its reverse (2004022), we get a palindrome (24044042).

The spelling of 22040020 in words is "twenty-two million, forty thousand, twenty".