18717914 has 4 divisors (see below), whose sum is σ = 28076874. Its totient is φ = 9358956.

The previous prime is 18717913. The next prime is 18717931. The reversal of 18717914 is 41971781.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 10452289 + 8265625 = 3233^2 + 2875^2 .

It is a super-2 number, since 2×18717914² = 700720609022792, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18717913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4679477 + ... + 4679480.

Almost surely, 2^18717914 is an apocalyptic number.

18717914 is a deficient number, since it is larger than the sum of its proper divisors (9358960).

18717914 is an equidigital number, since it uses as much as digits as its factorization.

18717914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9358959.

The product of its digits is 14112, while the sum is 38.

The square root of 18717914 is about 4326.4204603806. The cubic root of 18717914 is about 265.5130159375.

The spelling of 18717914 in words is "eighteen million, seven hundred seventeen thousand, nine hundred fourteen".