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BaseRepresentation
bin100010011010…
…1100010111001
31020221210020112
41010311202321
514104420423
61442434105
7306244442
oct104654271
936853215
1018045113
11a205619
126062935
13397a6a8
14257a2c9
1518b6a78
hex11358b9

18045113 has 4 divisors (see below), whose sum is σ = 18262608. Its totient is φ = 17827620.

The previous prime is 18045067. The next prime is 18045173. The reversal of 18045113 is 31154081.

Adding to 18045113 its reverse (31154081), we get a palindrome (49199194).

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18045113 - 214 = 18028729 is a prime.

It is a super-2 number, since 2×180451132 = 651252206365538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18045173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108623 + ... + 108788.

It is an arithmetic number, because the mean of its divisors is an integer number (4565652).

Almost surely, 218045113 is an apocalyptic number.

It is an amenable number.

18045113 is a deficient number, since it is larger than the sum of its proper divisors (217495).

18045113 is an equidigital number, since it uses as much as digits as its factorization.

18045113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217494.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 18045113 is about 4247.9539780935. The cubic root of 18045113 is about 262.2929002946.

The spelling of 18045113 in words is "eighteen million, forty-five thousand, one hundred thirteen".

Divisors: 1 83 217411 18045113