18948117 has 4 divisors (see below), whose sum is σ = 25264160. Its totient is φ = 12632076.

The previous prime is 18948089. The next prime is 18948121. The reversal of 18948117 is 71184981.

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 18948117 - 2⁷ = 18947989 is a prime.

It is a super-2 number, since 2×18948117² = 718062275691378, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18948197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3158017 + ... + 3158022.

It is an arithmetic number, because the mean of its divisors is an integer number (6316040).

Almost surely, 2^18948117 is an apocalyptic number.

It is an amenable number.

18948117 is a deficient number, since it is larger than the sum of its proper divisors (6316043).

18948117 is an equidigital number, since it uses as much as digits as its factorization.

18948117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6316042.

The product of its digits is 16128, while the sum is 39.

The square root of 18948117 is about 4352.9434868833. The cubic root of 18948117 is about 266.5970580468.

It can be divided in two parts, 1894 and 8117, that added together give a triangular number (10011 = T₁₄₁).

The spelling of 18948117 in words is "eighteen million, nine hundred forty-eight thousand, one hundred seventeen".