18869117 has 4 divisors (see below), whose sum is σ = 18899196. Its totient is φ = 18839040.

The previous prime is 18869093. The next prime is 18869153. The reversal of 18869117 is 71196881.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17799961 + 1069156 = 4219^2 + 1034^2 .

It is a cyclic number.

It is not a de Polignac number, because 18869117 - 2¹⁴ = 18852733 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 (18869017) 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, 14078 + ... + 15359.

It is an arithmetic number, because the mean of its divisors is an integer number (4724799).

Almost surely, 2^18869117 is an apocalyptic number.

It is an amenable number.

18869117 is a deficient number, since it is larger than the sum of its proper divisors (30079).

18869117 is an equidigital number, since it uses as much as digits as its factorization.

18869117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30078.

The product of its digits is 24192, while the sum is 41.

The square root of 18869117 is about 4343.8596892625. The cubic root of 18869117 is about 266.2260360337.

The spelling of 18869117 in words is "eighteen million, eight hundred sixty-nine thousand, one hundred seventeen".