18434918 has 8 divisors (see below), whose sum is σ = 27682248. Its totient is φ = 9207504.

The previous prime is 18434879. The next prime is 18434957. The reversal of 18434918 is 81943481.

It is an interprime number because it is at equal distance from previous prime (18434879) and next prime (18434957).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2396 + ... + 6527.

It is an arithmetic number, because the mean of its divisors is an integer number (3460281).

Almost surely, 2^18434918 is an apocalyptic number.

18434918 is a deficient number, since it is larger than the sum of its proper divisors (9247330).

18434918 is a wasteful number, since it uses less digits than its factorization.

18434918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9958.

The product of its digits is 27648, while the sum is 38.

The square root of 18434918 is about 4293.5903390985. The cubic root of 18434918 is about 264.1681187358.

The spelling of 18434918 in words is "eighteen million, four hundred thirty-four thousand, nine hundred eighteen".