18012988 has 48 divisors (see below), whose sum is σ = 38752000. Its totient is φ = 7302960.

The previous prime is 18012983. The next prime is 18013003. The reversal of 18012988 is 88921081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18012983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25723 + ... + 26413.

Almost surely, 2^18012988 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 18012988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19376000).

18012988 is an abundant number, since it is smaller than the sum of its proper divisors (20739012).

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

18012988 is a wasteful number, since it uses less digits than its factorization.

18012988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735 (or 719 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 37.

The square root of 18012988 is about 4244.1710615855. The cubic root of 18012988 is about 262.1371579500.

The spelling of 18012988 in words is "eighteen million, twelve thousand, nine hundred eighty-eight".