20604117 has 4 divisors (see below), whose sum is σ = 27472160. Its totient is φ = 13736076.

The previous prime is 20604107. The next prime is 20604131. The reversal of 20604117 is 71140602.

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.

It is not a de Polignac number, because 20604117 - 2⁸ = 20603861 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20604093 and 20604102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20604107) by changing a digit.

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, 3434017 + ... + 3434022.

It is an arithmetic number, because the mean of its divisors is an integer number (6868040).

Almost surely, 2^20604117 is an apocalyptic number.

It is an amenable number.

20604117 is a deficient number, since it is larger than the sum of its proper divisors (6868043).

20604117 is an equidigital number, since it uses as much as digits as its factorization.

20604117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6868042.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 20604117 is about 4539.1758062450. The cubic root of 20604117 is about 274.1477394242.

Adding to 20604117 its reverse (71140602), we get a palindrome (91744719).

The spelling of 20604117 in words is "twenty million, six hundred four thousand, one hundred seventeen".