20104873 has 4 divisors (see below), whose sum is σ = 20150100. Its totient is φ = 20059648.

The previous prime is 20104867. The next prime is 20104901. The reversal of 20104873 is 37840102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37840102 = 2 ⋅18920051.

It can be written as a sum of positive squares in 2 ways, for example, as 16875664 + 3229209 = 4108^2 + 1797^2 .

It is a cyclic number.

It is not a de Polignac number, because 20104873 - 2⁹ = 20104361 is a prime.

It is a super-2 number, since 2×20104873² = 808411836692258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20104823) 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, 21940 + ... + 22837.

It is an arithmetic number, because the mean of its divisors is an integer number (5037525).

Almost surely, 2^20104873 is an apocalyptic number.

It is an amenable number.

20104873 is a deficient number, since it is larger than the sum of its proper divisors (45227).

20104873 is an equidigital number, since it uses as much as digits as its factorization.

20104873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45226.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 20104873 is about 4483.8457823614. The cubic root of 20104873 is about 271.9153833174.

Adding to 20104873 its reverse (37840102), we get a palindrome (57944975).

The spelling of 20104873 in words is "twenty million, one hundred four thousand, eight hundred seventy-three".