20168255 has 4 divisors (see below), whose sum is σ = 24201912. Its totient is φ = 16134600.

The previous prime is 20168251. The next prime is 20168257. The reversal of 20168255 is 55286102.

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

It is not a de Polignac number, because 20168255 - 2² = 20168251 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20168251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2016821 + ... + 2016830.

It is an arithmetic number, because the mean of its divisors is an integer number (6050478).

Almost surely, 2^20168255 is an apocalyptic number.

20168255 is a deficient number, since it is larger than the sum of its proper divisors (4033657).

20168255 is an equidigital number, since it uses as much as digits as its factorization.

20168255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4033656.

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 20168255 is about 4490.9080373573. The cubic root of 20168255 is about 272.2008275718.

The spelling of 20168255 in words is "twenty million, one hundred sixty-eight thousand, two hundred fifty-five".