22220420240 has 20 divisors (see below), whose sum is σ = 51662477244. Its totient is φ = 8888168064.

The previous prime is 22220420179. The next prime is 22220420273. The reversal of 22220420240 is 4202402222.

It can be written as a sum of positive squares in 2 ways, for example, as 7763724544 + 14456695696 = 88112^2 + 120236^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138877547 + ... + 138877706.

Almost surely, 2^22220420240 is an apocalyptic number.

22220420240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22220420240 is an abundant number, since it is smaller than the sum of its proper divisors (29442057004).

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

22220420240 is a wasteful number, since it uses less digits than its factorization.

22220420240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277755266 (or 277755260 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 22220420240 its reverse (4202402222), we get a palindrome (26422822462).

The spelling of 22220420240 in words is "twenty-two billion, two hundred twenty million, four hundred twenty thousand, two hundred forty".