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18374423 = 109316811
BaseRepresentation
bin100011000010…
…1111100010111
31021120111222012
41012011330113
514200440143
61453454435
7312115514
oct106057427
937514865
1018374423
11a40aa81
1261a141b
133a64552
14262430b
15192e418
hex1185f17

18374423 has 4 divisors (see below), whose sum is σ = 18392328. Its totient is φ = 18356520.

The previous prime is 18374417. The next prime is 18374431. The reversal of 18374423 is 32447381.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18374423 - 218 = 18112279 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18374423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18374443) 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 3 ways as a sum of consecutive naturals, for example, 7313 + ... + 9498.

It is an arithmetic number, because the mean of its divisors is an integer number (4598082).

Almost surely, 218374423 is an apocalyptic number.

18374423 is a deficient number, since it is larger than the sum of its proper divisors (17905).

18374423 is a wasteful number, since it uses less digits than its factorization.

18374423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17904.

The product of its digits is 16128, while the sum is 32.

The square root of 18374423 is about 4286.5397466955. The cubic root of 18374423 is about 263.8788422858.

The spelling of 18374423 in words is "eighteen million, three hundred seventy-four thousand, four hundred twenty-three".

Divisors: 1 1093 16811 18374423