20169285 has 16 divisors (see below), whose sum is σ = 32326656. Its totient is φ = 10738368.

The previous prime is 20169271. The next prime is 20169299. The reversal of 20169285 is 58296102.

It is an interprime number because it is at equal distance from previous prime (20169271) and next prime (20169299).

It is not a de Polignac number, because 20169285 - 2⁸ = 20169029 is a prime.

It is a super-2 number, since 2×20169285² = 813600114822450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 15687 + ... + 16923.

It is an arithmetic number, because the mean of its divisors is an integer number (2020416).

Almost surely, 2^20169285 is an apocalyptic number.

It is an amenable number.

20169285 is a deficient number, since it is larger than the sum of its proper divisors (12157371).

20169285 is a wasteful number, since it uses less digits than its factorization.

20169285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2332.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 20169285 is about 4491.0227120334. The cubic root of 20169285 is about 272.2054612908.

The spelling of 20169285 in words is "twenty million, one hundred sixty-nine thousand, two hundred eighty-five".