18029968 has 60 divisors (see below), whose sum is σ = 39250960. Its totient is φ = 8015040.

The previous prime is 18029959. The next prime is 18029969. The reversal of 18029968 is 86992081.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18029969) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 129643 + ... + 129781.

Almost surely, 2^18029968 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 18029968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19625480).

18029968 is an abundant number, since it is smaller than the sum of its proper divisors (21220992).

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

18029968 is a wasteful number, since it uses less digits than its factorization.

18029968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236 (or 219 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 18029968 is about 4246.1709810134. The cubic root of 18029968 is about 262.2195002218.

The spelling of 18029968 in words is "eighteen million, twenty-nine thousand, nine hundred sixty-eight".