18236145 has 8 divisors (see below), whose sum is σ = 29177856. Its totient is φ = 9725936.

The previous prime is 18236131. The next prime is 18236147. The reversal of 18236145 is 54163281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18236145 - 2⁴ = 18236129 is a prime.

It is a super-2 number, since 2×18236145² = 665113968922050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18236147) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 607857 + ... + 607886.

It is an arithmetic number, because the mean of its divisors is an integer number (3647232).

Almost surely, 2^18236145 is an apocalyptic number.

18236145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18236145 is a deficient number, since it is larger than the sum of its proper divisors (10941711).

18236145 is a wasteful number, since it uses less digits than its factorization.

18236145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1215751.

The product of its digits is 5760, while the sum is 30.

The square root of 18236145 is about 4270.3799596757. The cubic root of 18236145 is about 263.2152285991.

It can be divided in two parts, 18236 and 145, that added together give a palindrome (18381).

The spelling of 18236145 in words is "eighteen million, two hundred thirty-six thousand, one hundred forty-five".