20112240040 has 32 divisors (see below), whose sum is σ = 46356264360. Its totient is φ = 7848678400.

The previous prime is 20112240019. The next prime is 20112240041. The reversal of 20112240040 is 4004221102.

It can be written as a sum of positive squares in 4 ways, for example, as 16285332996 + 3826907044 = 127614^2 + 61862^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20112239996 and 20112240023.

It is not an unprimeable number, because it can be changed into a prime (20112240041) by changing a digit.

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, 6130141 + ... + 6133420.

Almost surely, 2^20112240040 is an apocalyptic number.

20112240040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20112240040 is an abundant number, since it is smaller than the sum of its proper divisors (26244024320).

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

20112240040 is a wasteful number, since it uses less digits than its factorization.

20112240040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12263613 (or 12263609 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 20112240040 its reverse (4004221102), we get a palindrome (24116461142).

The spelling of 20112240040 in words is "twenty billion, one hundred twelve million, two hundred forty thousand, forty".