20440640200020 has 48 divisors (see below), whose sum is σ = 57234693700800. Its totient is φ = 5450751563776.

The previous prime is 20440640200009. The next prime is 20440640200063. The reversal of 20440640200020 is 2000204604402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1207156 + ... + 6506804.

It is an arithmetic number, because the mean of its divisors is an integer number (1192389452100).

Almost surely, 2^{20440640200020} is an apocalyptic number.

20440640200020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20440640200020 is an abundant number, since it is smaller than the sum of its proper divisors (36794053500780).

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

20440640200020 is a wasteful number, since it uses less digits than its factorization.

20440640200020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5363944 (or 5363942 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 20440640200020 its reverse (2000204604402), we get a palindrome (22440844804422).

The spelling of 20440640200020 in words is "twenty trillion, four hundred forty billion, six hundred forty million, two hundred thousand, twenty".