16690018 has 16 divisors (see below), whose sum is σ = 26853120. Its totient is φ = 7755696.

The previous prime is 16690001. The next prime is 16690031. The reversal of 16690018 is 81009661.

It is a happy number.

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, 2130 + ... + 6157.

It is an arithmetic number, because the mean of its divisors is an integer number (1678320).

Almost surely, 2^16690018 is an apocalyptic number.

16690018 is a deficient number, since it is larger than the sum of its proper divisors (10163102).

16690018 is a wasteful number, since it uses less digits than its factorization.

16690018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8361.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 16690018 is about 4085.3418461617. The cubic root of 16690018 is about 255.5557174402. Note that the first 3 decimals are identical.

Adding to 16690018 its reverse (81009661), we get a palindrome (97699679).

The spelling of 16690018 in words is "sixteen million, six hundred ninety thousand, eighteen".