20413345450566 has 16 divisors (see below), whose sum is σ = 40981925470464. Its totient is φ = 6778576055304.

The previous prime is 20413345450541. The next prime is 20413345450567. The reversal of 20413345450566 is 66505454331402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20413345450567) 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, 6468105346 + ... + 6468108501.

It is an arithmetic number, because the mean of its divisors is an integer number (2561370341904).

Almost surely, 2^{20413345450566} is an apocalyptic number.

20413345450566 is an abundant number, since it is smaller than the sum of its proper divisors (20568580019898).

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

20413345450566 is a wasteful number, since it uses less digits than its factorization.

20413345450566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12936214115.

The product of its (nonzero) digits is 5184000, while the sum is 48.

Adding to 20413345450566 its reverse (66505454331402), we get a palindrome (86918799781968).

The spelling of 20413345450566 in words is "twenty trillion, four hundred thirteen billion, three hundred forty-five million, four hundred fifty thousand, five hundred sixty-six".