18803117 has 4 divisors (see below), whose sum is σ = 18860256. Its totient is φ = 18745980.

The previous prime is 18803077. The next prime is 18803129. The reversal of 18803117 is 71130881.

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 a cyclic number.

It is not a de Polignac number, because 18803117 - 2⁶ = 18803053 is a prime.

It is a super-4 number, since 4×18803117⁴ (a number of 30 digits) contains 4444 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18803117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18803177) 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, 28073 + ... + 28734.

It is an arithmetic number, because the mean of its divisors is an integer number (4715064).

Almost surely, 2^18803117 is an apocalyptic number.

It is an amenable number.

18803117 is a deficient number, since it is larger than the sum of its proper divisors (57139).

18803117 is an equidigital number, since it uses as much as digits as its factorization.

18803117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57138.

The product of its (nonzero) digits is 1344, while the sum is 29.

The square root of 18803117 is about 4336.2561040603. The cubic root of 18803117 is about 265.9152734849.

Adding to 18803117 its reverse (71130881), we get a palindrome (89933998).

The spelling of 18803117 in words is "eighteen million, eight hundred three thousand, one hundred seventeen".