18144036 has 18 divisors (see below), whose sum is σ = 45864182. Its totient is φ = 6048000.

The previous prime is 18144029. The next prime is 18144043. The reversal of 18144036 is 63044181.

It is an interprime number because it is at equal distance from previous prime (18144029) and next prime (18144043).

It can be written as a sum of positive squares in only one way, i.e., 11943936 + 6200100 = 3456^2 + 2490^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 251965 + ... + 252036.

Almost surely, 2^18144036 is an apocalyptic number.

It is an amenable number.

18144036 is an abundant number, since it is smaller than the sum of its proper divisors (27720146).

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

18144036 is a wasteful number, since it uses less digits than its factorization.

18144036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504011 (or 504006 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 18144036 is about 4259.5816696009. The cubic root of 18144036 is about 262.7713221836.

It can be divided in two parts, 1814403 and 6, that added together give a square (1814409 = 1347²).

The spelling of 18144036 in words is "eighteen million, one hundred forty-four thousand, thirty-six".