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18130195 = 531116969
BaseRepresentation
bin100010100101…
…0010100010011
31021010002221201
41011022110103
514120131240
61444332031
7310050466
oct105122423
937102851
1018130195
11a263536
1260a4017
1339aa335
14259d2dd
1518d1d9a
hex114a513

18130195 has 8 divisors (see below), whose sum is σ = 22458240. Its totient is φ = 14036160.

The previous prime is 18130193. The next prime is 18130213. The reversal of 18130195 is 59103181.

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

It is not a de Polignac number, because 18130195 - 21 = 18130193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18130193) 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, 58330 + ... + 58639.

It is an arithmetic number, because the mean of its divisors is an integer number (2807280).

Almost surely, 218130195 is an apocalyptic number.

18130195 is a deficient number, since it is larger than the sum of its proper divisors (4328045).

18130195 is a wasteful number, since it uses less digits than its factorization.

18130195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117005.

The product of its (nonzero) digits is 1080, while the sum is 28.

The square root of 18130195 is about 4257.9566695776. The cubic root of 18130195 is about 262.7044876770.

The spelling of 18130195 in words is "eighteen million, one hundred thirty thousand, one hundred ninety-five".

Divisors: 1 5 31 155 116969 584845 3626039 18130195