20351105 has 4 divisors (see below), whose sum is σ = 24421332. Its totient is φ = 16280880.

The previous prime is 20351101. The next prime is 20351117. The reversal of 20351105 is 50115302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50115302 = 2 ⋅25057651.

It can be written as a sum of positive squares in 2 ways, for example, as 13082689 + 7268416 = 3617^2 + 2696^2 .

It is not a de Polignac number, because 20351105 - 2² = 20351101 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20351101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2035106 + ... + 2035115.

It is an arithmetic number, because the mean of its divisors is an integer number (6105333).

Almost surely, 2^20351105 is an apocalyptic number.

It is an amenable number.

20351105 is a deficient number, since it is larger than the sum of its proper divisors (4070227).

20351105 is an equidigital number, since it uses as much as digits as its factorization.

20351105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4070226.

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 20351105 is about 4511.2199015344. The cubic root of 20351105 is about 273.0209656196.

Adding to 20351105 its reverse (50115302), we get a palindrome (70466407).

The spelling of 20351105 in words is "twenty million, three hundred fifty-one thousand, one hundred five".