20386105 has 4 divisors (see below), whose sum is σ = 24463332. Its totient is φ = 16308880.

The previous prime is 20386099. The next prime is 20386117. The reversal of 20386105 is 50168302.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15077689 + 5308416 = 3883^2 + 2304^2 .

It is not a de Polignac number, because 20386105 - 2⁷ = 20385977 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 20386105.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2038606 + ... + 2038615.

It is an arithmetic number, because the mean of its divisors is an integer number (6115833).

Almost surely, 2^20386105 is an apocalyptic number.

It is an amenable number.

20386105 is a deficient number, since it is larger than the sum of its proper divisors (4077227).

20386105 is an equidigital number, since it uses as much as digits as its factorization.

20386105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4077226.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 20386105 is about 4515.0974518830. The cubic root of 20386105 is about 273.1773905576.

The spelling of 20386105 in words is "twenty million, three hundred eighty-six thousand, one hundred five".