20404026404445 has 8 divisors (see below), whose sum is σ = 32646442247136. Its totient is φ = 10882147415696.

The previous prime is 20404026404401. The next prime is 20404026404449. The reversal of 20404026404445 is 54440462040402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20404026404445 - 2²⁴ = 20404009627229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20404026404449) 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, 680134213467 + ... + 680134213496.

It is an arithmetic number, because the mean of its divisors is an integer number (4080805280892).

Almost surely, 2^{20404026404445} is an apocalyptic number.

It is an amenable number.

20404026404445 is a deficient number, since it is larger than the sum of its proper divisors (12242415842691).

20404026404445 is a wasteful number, since it uses less digits than its factorization.

20404026404445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1360268426971.

The product of its (nonzero) digits is 491520, while the sum is 39.

Adding to 20404026404445 its reverse (54440462040402), we get a palindrome (74844488444847).

The spelling of 20404026404445 in words is "twenty trillion, four hundred four billion, twenty-six million, four hundred four thousand, four hundred forty-five".