18718334 has 4 divisors (see below), whose sum is σ = 28077504. Its totient is φ = 9359166.

The previous prime is 18718321. The next prime is 18718351. The reversal of 18718334 is 43381781.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43381781 = 71 ⋅611011.

It is a junction number, because it is equal to n+sod(n) for n = 18718294 and 18718303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4679582 + ... + 4679585.

It is an arithmetic number, because the mean of its divisors is an integer number (7019376).

Almost surely, 2^18718334 is an apocalyptic number.

18718334 is a deficient number, since it is larger than the sum of its proper divisors (9359170).

18718334 is an equidigital number, since it uses as much as digits as its factorization.

18718334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9359169.

The product of its digits is 16128, while the sum is 35.

The square root of 18718334 is about 4326.4689990800. The cubic root of 18718334 is about 265.5150018182.

The spelling of 18718334 in words is "eighteen million, seven hundred eighteen thousand, three hundred thirty-four".