20404026404443 has 16 divisors (see below), whose sum is σ = 22726437398784. Its totient is φ = 18162847596960.

The previous prime is 20404026404401. The next prime is 20404026404449. The reversal of 20404026404443 is 34440462040402.

It is not a de Polignac number, because 20404026404443 - 2¹³ = 20404026396251 is a prime.

It is a super-2 number, since 2×20404026404443² (a number of 27 digits) contains 22 as substring.

It is a Duffinian 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 15 ways as a sum of consecutive naturals, for example, 82766880 + ... + 83013037.

It is an arithmetic number, because the mean of its divisors is an integer number (1420402337424).

Almost surely, 2^{20404026404443} is an apocalyptic number.

20404026404443 is a deficient number, since it is larger than the sum of its proper divisors (2322410994341).

20404026404443 is a wasteful number, since it uses less digits than its factorization.

20404026404443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165780162.

The product of its (nonzero) digits is 294912, while the sum is 37.

Adding to 20404026404443 its reverse (34440462040402), we get a palindrome (54844488444845).

The spelling of 20404026404443 in words is "twenty trillion, four hundred four billion, twenty-six million, four hundred four thousand, four hundred forty-three".