18066996 has 48 divisors (see below), whose sum is σ = 47234880. Its totient is φ = 5971680.

The previous prime is 18066991. The next prime is 18067013. The reversal of 18066996 is 69966081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18066991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13510 + ... + 14786.

It is an arithmetic number, because the mean of its divisors is an integer number (984060).

Almost surely, 2^18066996 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18066996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23617440).

18066996 is an abundant number, since it is smaller than the sum of its proper divisors (29167884).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18066996 is a wasteful number, since it uses less digits than its factorization.

18066996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1421 (or 1413 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 18066996 is about 4250.5289082654. The cubic root of 18066996 is about 262.3988835033.

It can be divided in two parts, 180 and 66996, that added together give a palindrome (67176).

The spelling of 18066996 in words is "eighteen million, sixty-six thousand, nine hundred ninety-six".