20116579 has 4 divisors (see below), whose sum is σ = 22990384. Its totient is φ = 17242776.

The previous prime is 20116543. The next prime is 20116619. The reversal of 20116579 is 97561102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20116579 - 2⁷ = 20116451 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20116579.

It is not an unprimeable number, because it can be changed into a prime (20116279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1436892 + ... + 1436905.

It is an arithmetic number, because the mean of its divisors is an integer number (5747596).

Almost surely, 2^20116579 is an apocalyptic number.

20116579 is a deficient number, since it is larger than the sum of its proper divisors (2873805).

20116579 is an equidigital number, since it uses as much as digits as its factorization.

20116579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2873804.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 20116579 is about 4485.1509450631. The cubic root of 20116579 is about 271.9681470413.

The spelling of 20116579 in words is "twenty million, one hundred sixteen thousand, five hundred seventy-nine".