18010988 has 6 divisors (see below), whose sum is σ = 31519236. Its totient is φ = 9005492.

The previous prime is 18010981. The next prime is 18010991. The reversal of 18010988 is 88901081.

It is a super-2 number, since 2×18010988² = 648791377472288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18010981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2251370 + ... + 2251377.

It is an arithmetic number, because the mean of its divisors is an integer number (5253206).

Almost surely, 2^18010988 is an apocalyptic number.

It is an amenable number.

18010988 is a deficient number, since it is larger than the sum of its proper divisors (13508248).

18010988 is a wasteful number, since it uses less digits than its factorization.

18010988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4502751 (or 4502749 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 35.

The square root of 18010988 is about 4243.9354377747. The cubic root of 18010988 is about 262.1274558076.

The spelling of 18010988 in words is "eighteen million, ten thousand, nine hundred eighty-eight".