20404245204044 has 24 divisors (see below), whose sum is σ = 40126074182880. Its totient is φ = 9007894203264.

The previous prime is 20404245204041. The next prime is 20404245204059. The reversal of 20404245204044 is 44040254240402.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20404245203995 and 20404245204013.

It is not an unprimeable number, because it can be changed into a prime (20404245204041) 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, 8530201649 + ... + 8530204040.

It is an arithmetic number, because the mean of its divisors is an integer number (1671919757620).

Almost surely, 2^{20404245204044} is an apocalyptic number.

It is an amenable number.

20404245204044 is a deficient number, since it is larger than the sum of its proper divisors (19721828978836).

20404245204044 is a wasteful number, since it uses less digits than its factorization.

20404245204044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17060405729 (or 17060405727 counting only the distinct ones).

The product of its (nonzero) digits is 163840, while the sum is 35.

Adding to 20404245204044 its reverse (44040254240402), we get a palindrome (64444499444446).

The spelling of 20404245204044 in words is "twenty trillion, four hundred four billion, two hundred forty-five million, two hundred four thousand, forty-four".