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18306113 = 711323143
BaseRepresentation
bin100010111010…
…1010001000001
31021110001021012
41011311101001
514141243423
61452210305
7311412410
oct105652101
937401235
1018306113
11a373721
126169995
133a3c427
142607477
151919078
hex1175441

18306113 has 8 divisors (see below), whose sum is σ = 21107328. Its totient is φ = 15551424.

The previous prime is 18306053. The next prime is 18306121. The reversal of 18306113 is 31160381.

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

It is not a de Polignac number, because 18306113 - 212 = 18302017 is a prime.

It is a super-2 number, since 2×183061132 = 670227546337538, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18306173) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10781 + ... + 12362.

It is an arithmetic number, because the mean of its divisors is an integer number (2638416).

Almost surely, 218306113 is an apocalyptic number.

It is an amenable number.

18306113 is a deficient number, since it is larger than the sum of its proper divisors (2801215).

18306113 is a wasteful number, since it uses less digits than its factorization.

18306113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23263.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 18306113 is about 4278.5643620261. The cubic root of 18306113 is about 263.5514315938.

Adding to 18306113 its reverse (31160381), we get a palindrome (49466494).

The spelling of 18306113 in words is "eighteen million, three hundred six thousand, one hundred thirteen".

Divisors: 1 7 113 791 23143 162001 2615159 18306113