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13818469 = 72385829
BaseRepresentation
bin110100101101…
…101001100101
3222000001101011
4310231221211
512014142334
61212102221
7225312040
oct64555145
928001334
1013818469
117889025
124764971
132b2a912
141b99c57
15132e564
hexd2da65

13818469 has 8 divisors (see below), whose sum is σ = 16479360. Its totient is φ = 11329296.

The previous prime is 13818457. The next prime is 13818473. The reversal of 13818469 is 96481831.

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 13818469 - 27 = 13818341 is a prime.

It is a super-2 number, since 2×138184692 = 381900171007922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13818439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42754 + ... + 43075.

It is an arithmetic number, because the mean of its divisors is an integer number (2059920).

Almost surely, 213818469 is an apocalyptic number.

It is an amenable number.

13818469 is a deficient number, since it is larger than the sum of its proper divisors (2660891).

13818469 is an equidigital number, since it uses as much as digits as its factorization.

13818469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85859.

The product of its digits is 41472, while the sum is 40.

The square root of 13818469 is about 3717.3201368728. The cubic root of 13818469 is about 239.9679876284.

The spelling of 13818469 in words is "thirteen million, eight hundred eighteen thousand, four hundred sixty-nine".

Divisors: 1 7 23 161 85829 600803 1974067 13818469