20402040044 has 24 divisors (see below), whose sum is σ = 36902304768. Its totient is φ = 9859363920.

The previous prime is 20402040031. The next prime is 20402040049. The reversal of 20402040044 is 44004020402.

It is a junction number, because it is equal to n+sod(n) for n = 20402039998 and 20402040025.

It is not an unprimeable number, because it can be changed into a prime (20402040049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6944 + ... + 202119.

It is an arithmetic number, because the mean of its divisors is an integer number (1537596032).

Almost surely, 2^20402040044 is an apocalyptic number.

It is an amenable number.

20402040044 is a deficient number, since it is larger than the sum of its proper divisors (16500264724).

20402040044 is a wasteful number, since it uses less digits than its factorization.

20402040044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209885 (or 209883 counting only the distinct ones).

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

Adding to 20402040044 its reverse (44004020402), we get a palindrome (64406060446).

The spelling of 20402040044 in words is "twenty billion, four hundred two million, forty thousand, forty-four".