20440140350040 has 48 divisors (see below), whose sum is σ = 66430456138800. Its totient is φ = 5450704093248.

The previous prime is 20440140350029. The next prime is 20440140350087. The reversal of 20440140350040 is 4005304104402.

It is a happy number.

20440140350040 is a `hidden beast` number, since 204 + 4 + 0 + 1 + 403 + 50 + 0 + 4 + 0 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 20440140349986 and 20440140350013.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28389083460 + ... + 28389084179.

It is an arithmetic number, because the mean of its divisors is an integer number (1383967836225).

Almost surely, 2^{20440140350040} is an apocalyptic number.

20440140350040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20440140350040 is an abundant number, since it is smaller than the sum of its proper divisors (45990315788760).

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

20440140350040 is a wasteful number, since it uses less digits than its factorization.

20440140350040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56778167656 (or 56778167649 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

Adding to 20440140350040 its reverse (4005304104402), we get a palindrome (24445444454442).

The spelling of 20440140350040 in words is "twenty trillion, four hundred forty billion, one hundred forty million, three hundred fifty thousand, forty".