20002242440 has 16 divisors (see below), whose sum is σ = 45005045580. Its totient is φ = 8000896960.

The previous prime is 20002242397. The next prime is 20002242443. The reversal of 20002242440 is 4424220002.

It can be written as a sum of positive squares in 2 ways, for example, as 19898487844 + 103754596 = 141062^2 + 10186^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20002242443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250027991 + ... + 250028070.

Almost surely, 2^20002242440 is an apocalyptic number.

20002242440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20002242440 is an abundant number, since it is smaller than the sum of its proper divisors (25002803140).

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

20002242440 is a wasteful number, since it uses less digits than its factorization.

20002242440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500056072 (or 500056068 counting only the distinct ones).

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

Adding to 20002242440 its reverse (4424220002), we get a palindrome (24426462442).

The spelling of 20002242440 in words is "twenty billion, two million, two hundred forty-two thousand, four hundred forty".