20566983841 has 8 divisors (see below), whose sum is σ = 20780193600. Its totient is φ = 20354787600.

The previous prime is 20566983839. The next prime is 20566983851. The reversal of 20566983841 is 14838966502.

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 20566983841 - 2¹ = 20566983839 is a prime.

It is a super-2 number, since 2×20566983841² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20566983851) 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, 212551 + ... + 293788.

It is an arithmetic number, because the mean of its divisors is an integer number (2597524200).

Almost surely, 2^20566983841 is an apocalyptic number.

It is an amenable number.

20566983841 is a deficient number, since it is larger than the sum of its proper divisors (213209759).

20566983841 is a wasteful number, since it uses less digits than its factorization.

20566983841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506759.

The product of its (nonzero) digits is 2488320, while the sum is 52.

The spelling of 20566983841 in words is "twenty billion, five hundred sixty-six million, nine hundred eighty-three thousand, eight hundred forty-one".