20044004000040 has 64 divisors (see below), whose sum is σ = 66813346670400. Its totient is φ = 5345067733056.

The previous prime is 20044004000029. The next prime is 20044004000129. The reversal of 20044004000040 is 4000040044002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20044003999977 and 20044004000022.

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, 9279630402 + ... + 9279632561.

It is an arithmetic number, because the mean of its divisors is an integer number (1043958541725).

Almost surely, 2^{20044004000040} is an apocalyptic number.

20044004000040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20044004000040 is an abundant number, since it is smaller than the sum of its proper divisors (46769342670360).

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

20044004000040 is a wasteful number, since it uses less digits than its factorization.

20044004000040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18559262983 (or 18559262973 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

Adding to 20044004000040 its reverse (4000040044002), we get a palindrome (24044044044042).

The spelling of 20044004000040 in words is "twenty trillion, forty-four billion, four million, forty", and thus it is an aban number.