20056117 has 4 divisors (see below), whose sum is σ = 20132640. Its totient is φ = 19979596.

The previous prime is 20056111. The next prime is 20056123. The reversal of 20056117 is 71165002.

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: 71165002 = 2 ⋅35582501.

It is an interprime number because it is at equal distance from previous prime (20056111) and next prime (20056123).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20056117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20056111) 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, 37867 + ... + 38392.

It is an arithmetic number, because the mean of its divisors is an integer number (5033160).

Almost surely, 2^20056117 is an apocalyptic number.

It is an amenable number.

20056117 is a deficient number, since it is larger than the sum of its proper divisors (76523).

20056117 is an equidigital number, since it uses as much as digits as its factorization.

20056117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76522.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 20056117 is about 4478.4056314720. The cubic root of 20056117 is about 271.6953995396.

The spelling of 20056117 in words is "twenty million, fifty-six thousand, one hundred seventeen".