20106873 has 20 divisors (see below), whose sum is σ = 30852580. Its totient is φ = 13040352.

The previous prime is 20106847. The next prime is 20106893. The reversal of 20106873 is 37860102.

It can be written as a sum of positive squares in 2 ways, for example, as 15896169 + 4210704 = 3987^2 + 2052^2 .

It is not a de Polignac number, because 20106873 - 2⁵ = 20106841 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20106803) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 358 + ... + 6351.

It is an arithmetic number, because the mean of its divisors is an integer number (1542629).

Almost surely, 2^20106873 is an apocalyptic number.

It is an amenable number.

20106873 is a deficient number, since it is larger than the sum of its proper divisors (10745707).

20106873 is an equidigital number, since it uses as much as digits as its factorization.

20106873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6758 (or 6749 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 20106873 is about 4484.0687996506. The cubic root of 20106873 is about 271.9243995848.

Adding to 20106873 its reverse (37860102), we get a palindrome (57966975).

The spelling of 20106873 in words is "twenty million, one hundred six thousand, eight hundred seventy-three".