18014004 has 18 divisors (see below), whose sum is σ = 45535490. Its totient is φ = 6004656.

The previous prime is 18013997. The next prime is 18014021. The reversal of 18014004 is 40041081.

It can be written as a sum of positive squares in only one way, i.e., 17892900 + 121104 = 4230^2 + 348^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×18014004² = 649008680224032, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 250159 + ... + 250230.

Almost surely, 2^18014004 is an apocalyptic number.

It is an amenable number.

18014004 is an abundant number, since it is smaller than the sum of its proper divisors (27521486).

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

18014004 is a wasteful number, since it uses less digits than its factorization.

18014004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500399 (or 500394 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 18014004 is about 4244.2907534711. The cubic root of 18014004 is about 262.1420863632.

Adding to 18014004 its reverse (40041081), we get a palindrome (58055085).

The spelling of 18014004 in words is "eighteen million, fourteen thousand, four".