20047169 has 4 divisors (see below), whose sum is σ = 20152320. Its totient is φ = 19942020.

The previous prime is 20047151. The next prime is 20047177. The reversal of 20047169 is 96174002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 96174002 = 2 ⋅48087001.

It is a cyclic number.

It is not a de Polignac number, because 20047169 - 2⁸ = 20046913 is a prime.

It is a super-2 number, since 2×20047169² = 803777969829122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20047129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52289 + ... + 52670.

It is an arithmetic number, because the mean of its divisors is an integer number (5038080).

Almost surely, 2^20047169 is an apocalyptic number.

It is an amenable number.

20047169 is a deficient number, since it is larger than the sum of its proper divisors (105151).

20047169 is a wasteful number, since it uses less digits than its factorization.

20047169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105150.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 20047169 is about 4477.4065037698. The cubic root of 20047169 is about 271.6549880602.

The spelling of 20047169 in words is "twenty million, forty-seven thousand, one hundred sixty-nine".