20255165 has 8 divisors (see below), whose sum is σ = 27778560. Its totient is φ = 13889232.

The previous prime is 20255161. The next prime is 20255171. The reversal of 20255165 is 56155202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20255165 - 2² = 20255161 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20255161) 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 7 ways as a sum of consecutive naturals, for example, 289325 + ... + 289394.

It is an arithmetic number, because the mean of its divisors is an integer number (3472320).

Almost surely, 2^20255165 is an apocalyptic number.

It is an amenable number.

20255165 is a deficient number, since it is larger than the sum of its proper divisors (7523395).

20255165 is an equidigital number, since it uses as much as digits as its factorization.

20255165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578731.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 20255165 is about 4500.5738522993. The cubic root of 20255165 is about 272.5912608508.

The spelling of 20255165 in words is "twenty million, two hundred fifty-five thousand, one hundred sixty-five".