22004040020 has 24 divisors (see below), whose sum is σ = 46406813544. Its totient is φ = 8763838976.

The previous prime is 22004040013. The next prime is 22004040053. The reversal of 22004040020 is 2004040022.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 485497156 + 21518542864 = 22034^2 + 146692^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22004039977 and 22004040004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2356289 + ... + 2365608.

It is an arithmetic number, because the mean of its divisors is an integer number (1933617231).

Almost surely, 2^22004040020 is an apocalyptic number.

22004040020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22004040020 is an abundant number, since it is smaller than the sum of its proper divisors (24402773524).

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

22004040020 is a wasteful number, since it uses less digits than its factorization.

22004040020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4722139 (or 4722137 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

Adding to 22004040020 its reverse (2004040022), we get a palindrome (24008080042).

The spelling of 22004040020 in words is "twenty-two billion, four million, forty thousand, twenty".