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18689323 is a prime number
BaseRepresentation
bin100011101001…
…0110100101011
31022011111221011
41013102310223
514241024243
61504324351
7314566552
oct107226453
938144834
1018689323
11a605624
1263136b7
133b44993
1426a6d99
15199289d
hex11d2d2b

18689323 has 2 divisors, whose sum is σ = 18689324. Its totient is φ = 18689322.

The previous prime is 18689291. The next prime is 18689339. The reversal of 18689323 is 32398681.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18689323 - 25 = 18689291 is a prime.

It is not a weakly prime, because it can be changed into another prime (18689383) 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 as a sum of consecutive naturals, namely, 9344661 + 9344662.

It is an arithmetic number, because the mean of its divisors is an integer number (9344662).

Almost surely, 218689323 is an apocalyptic number.

18689323 is a deficient number, since it is larger than the sum of its proper divisors (1).

18689323 is an equidigital number, since it uses as much as digits as its factorization.

18689323 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 40.

The square root of 18689323 is about 4323.1149649298. The cubic root of 18689323 is about 265.3777595717.

The spelling of 18689323 in words is "eighteen million, six hundred eighty-nine thousand, three hundred twenty-three".