20255505 has 8 divisors (see below), whose sum is σ = 32408832. Its totient is φ = 10802928.

The previous prime is 20255447. The next prime is 20255509. The reversal of 20255505 is 50555202.

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

It is not a de Polignac number, because 20255505 - 2⁶ = 20255441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20255509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 675169 + ... + 675198.

It is an arithmetic number, because the mean of its divisors is an integer number (4051104).

Almost surely, 2^20255505 is an apocalyptic number.

It is an amenable number.

20255505 is a deficient number, since it is larger than the sum of its proper divisors (12153327).

20255505 is a wasteful number, since it uses less digits than its factorization.

20255505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1350375.

The product of its (nonzero) digits is 2500, while the sum is 24.

The square root of 20255505 is about 4500.6116251016. The cubic root of 20255505 is about 272.5927860669.

The spelling of 20255505 in words is "twenty million, two hundred fifty-five thousand, five hundred five".