20534105 has 4 divisors (see below), whose sum is σ = 24640932. Its totient is φ = 16427280.

The previous prime is 20534099. The next prime is 20534141. The reversal of 20534105 is 50143502.

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 14462809 + 6071296 = 3803^2 + 2464^2 .

It is not a de Polignac number, because 20534105 - 2¹⁸ = 20271961 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2053406 + ... + 2053415.

It is an arithmetic number, because the mean of its divisors is an integer number (6160233).

Almost surely, 2^20534105 is an apocalyptic number.

It is an amenable number.

20534105 is a deficient number, since it is larger than the sum of its proper divisors (4106827).

20534105 is an equidigital number, since it uses as much as digits as its factorization.

20534105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4106826.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 20534105 is about 4531.4572711215. The cubic root of 20534105 is about 273.8368725490.

Adding to 20534105 its reverse (50143502), we get a palindrome (70677607).

It can be divided in two parts, 2053 and 4105, that multiplied together give a triangular number (8427565 = T₄₁₀₅).

The spelling of 20534105 in words is "twenty million, five hundred thirty-four thousand, one hundred five".