20118177 has 6 divisors (see below), whose sum is σ = 29059602. Its totient is φ = 13412112.

The previous prime is 20118107. The next prime is 20118179. The reversal of 20118177 is 77181102.

It can be written as a sum of positive squares in only one way, i.e., 19633761 + 484416 = 4431^2 + 696^2 .

It is not a de Polignac number, because 20118177 - 2²⁰ = 19069601 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20118177.

It is not an unprimeable number, because it can be changed into a prime (20118179) 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 5 ways as a sum of consecutive naturals, for example, 1117668 + ... + 1117685.

It is an arithmetic number, because the mean of its divisors is an integer number (4843267).

Almost surely, 2^20118177 is an apocalyptic number.

It is an amenable number.

20118177 is a deficient number, since it is larger than the sum of its proper divisors (8941425).

20118177 is a wasteful number, since it uses less digits than its factorization.

20118177 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2235359 (or 2235356 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 27.

The square root of 20118177 is about 4485.3290849167. The cubic root of 20118177 is about 271.9753482921.

Adding to 20118177 its reverse (77181102), we get a palindrome (97299279).

The spelling of 20118177 in words is "twenty million, one hundred eighteen thousand, one hundred seventy-seven".