18016418 has 16 divisors (see below), whose sum is σ = 31516800. Its totient is φ = 7721028.

The previous prime is 18016409. The next prime is 18016421. The reversal of 18016418 is 81461081.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12446 + ... + 13817.

It is an arithmetic number, because the mean of its divisors is an integer number (1969800).

Almost surely, 2^18016418 is an apocalyptic number.

18016418 is a deficient number, since it is larger than the sum of its proper divisors (13500382).

18016418 is an equidigital number, since it uses as much as digits as its factorization.

18016418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26286 (or 26272 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 29.

The square root of 18016418 is about 4244.5751259696. The cubic root of 18016418 is about 262.1537954522.

Adding to 18016418 its reverse (81461081), we get a palindrome (99477499).

The spelling of 18016418 in words is "eighteen million, sixteen thousand, four hundred eighteen".