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18230485 = 5713103389
BaseRepresentation
bin100010110001…
…0110011010101
31021022012112011
41011202303111
514131333420
61450424221
7310646050
oct105426325
937265464
1018230485
11a321919
126132071
133a13b90
1425c7a97
15190195a
hex1162cd5

18230485 has 32 divisors (see below), whose sum is σ = 27256320. Its totient is φ = 11397888.

The previous prime is 18230483. The next prime is 18230489. The reversal of 18230485 is 58403281.

It is a cyclic number.

It is not a de Polignac number, because 18230485 - 21 = 18230483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18230483) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46671 + ... + 47059.

It is an arithmetic number, because the mean of its divisors is an integer number (851760).

Almost surely, 218230485 is an apocalyptic number.

It is an amenable number.

18230485 is a deficient number, since it is larger than the sum of its proper divisors (9025835).

18230485 is a wasteful number, since it uses less digits than its factorization.

18230485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 18230485 is about 4269.7172037502. The cubic root of 18230485 is about 263.1879941817.

The spelling of 18230485 in words is "eighteen million, two hundred thirty thousand, four hundred eighty-five".

Divisors: 1 5 7 13 35 65 91 103 389 455 515 721 1339 1945 2723 3605 5057 6695 9373 13615 25285 35399 40067 46865 176995 200335 280469 520871 1402345 2604355 3646097 18230485