18218498 has 16 divisors (see below), whose sum is σ = 28089600. Its totient is φ = 8857296.

The previous prime is 18218491. The next prime is 18218513. The reversal of 18218498 is 89481281.

It is not an unprimeable number, because it can be changed into a prime (18218491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29711 + ... + 30317.

It is an arithmetic number, because the mean of its divisors is an integer number (1755600).

Almost surely, 2^18218498 is an apocalyptic number.

18218498 is a deficient number, since it is larger than the sum of its proper divisors (9871102).

18218498 is a wasteful number, since it uses less digits than its factorization.

18218498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001.

The product of its digits is 36864, while the sum is 41.

The square root of 18218498 is about 4268.3132499853. The cubic root of 18218498 is about 263.1302973038.

The spelling of 18218498 in words is "eighteen million, two hundred eighteen thousand, four hundred ninety-eight".