20104277 has 4 divisors (see below), whose sum is σ = 20978400. Its totient is φ = 19230156.

The previous prime is 20104241. The next prime is 20104307. The reversal of 20104277 is 77240102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 77240102 = 2 ⋅38620051.

It is a cyclic number.

It is not a de Polignac number, because 20104277 - 2¹² = 20100181 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 874099 = 20104277 / (2 + 0 + 1 + 0 + 4 + 2 + 7 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20104207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 437027 + ... + 437072.

It is an arithmetic number, because the mean of its divisors is an integer number (5244600).

Almost surely, 2^20104277 is an apocalyptic number.

It is an amenable number.

20104277 is a deficient number, since it is larger than the sum of its proper divisors (874123).

20104277 is an equidigital number, since it uses as much as digits as its factorization.

20104277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874122.

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 20104277 is about 4483.7793210639. The cubic root of 20104277 is about 271.9126963540.

Adding to 20104277 its reverse (77240102), we get a palindrome (97344379).

The spelling of 20104277 in words is "twenty million, one hundred four thousand, two hundred seventy-seven".