20848255 has 4 divisors (see below), whose sum is σ = 25017912. Its totient is φ = 16678600.

The previous prime is 20848253. The next prime is 20848259. The reversal of 20848255 is 55284802.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55284802 = 2 ⋅27642401.

It is not a de Polignac number, because 20848255 - 2¹ = 20848253 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 20848255.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20848253) 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, 2084821 + ... + 2084830.

It is an arithmetic number, because the mean of its divisors is an integer number (6254478).

Almost surely, 2^20848255 is an apocalyptic number.

20848255 is a deficient number, since it is larger than the sum of its proper divisors (4169657).

20848255 is an equidigital number, since it uses as much as digits as its factorization.

20848255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4169656.

The product of its (nonzero) digits is 25600, while the sum is 34.

The square root of 20848255 is about 4565.9889399778. The cubic root of 20848255 is about 275.2262820737.

The spelling of 20848255 in words is "twenty million, eight hundred forty-eight thousand, two hundred fifty-five".