20255105 has 16 divisors (see below), whose sum is σ = 26572224. Its totient is φ = 14731200.

The previous prime is 20255099. The next prime is 20255117. The reversal of 20255105 is 50155202.

It is a de Polignac number, because none of the positive numbers 2^k-20255105 is a prime.

It is a super-2 number, since 2×20255105² = 820538557122050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2030 + ... + 6680.

It is an arithmetic number, because the mean of its divisors is an integer number (1660764).

Almost surely, 2^20255105 is an apocalyptic number.

It is an amenable number.

20255105 is a deficient number, since it is larger than the sum of its proper divisors (6317119).

20255105 is a wasteful number, since it uses less digits than its factorization.

20255105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4736.

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 20255105 is about 4500.5671864777. The cubic root of 20255105 is about 272.5909916932.

The spelling of 20255105 in words is "twenty million, two hundred fifty-five thousand, one hundred five".