18954717 has 4 divisors (see below), whose sum is σ = 25272960. Its totient is φ = 12636476.

The previous prime is 18954697. The next prime is 18954721. The reversal of 18954717 is 71745981.

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: 71745981 = 3 ⋅23915327.

It is a cyclic number.

It is not a de Polignac number, because 18954717 - 2⁷ = 18954589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18954797) 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 3 ways as a sum of consecutive naturals, for example, 3159117 + ... + 3159122.

It is an arithmetic number, because the mean of its divisors is an integer number (6318240).

Almost surely, 2^18954717 is an apocalyptic number.

It is an amenable number.

18954717 is a deficient number, since it is larger than the sum of its proper divisors (6318243).

18954717 is an equidigital number, since it uses as much as digits as its factorization.

18954717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6318242.

The product of its digits is 70560, while the sum is 42.

The square root of 18954717 is about 4353.7015285846. The cubic root of 18954717 is about 266.6280081112.

The spelling of 18954717 in words is "eighteen million, nine hundred fifty-four thousand, seven hundred seventeen".