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18004342 = 29002171
BaseRepresentation
bin100010010101…
…1100101110110
31020212201022111
41010223211312
514102114332
61441521234
7306014536
oct104534566
936781274
1018004342
11a187a24
12604321a
133964c75
1425694c6
1518a9947
hex112b976

18004342 has 4 divisors (see below), whose sum is σ = 27006516. Its totient is φ = 9002170.

The previous prime is 18004321. The next prime is 18004367. The reversal of 18004342 is 24340081.

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

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

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, 4501084 + ... + 4501087.

It is an arithmetic number, because the mean of its divisors is an integer number (6751629).

Almost surely, 218004342 is an apocalyptic number.

18004342 is a deficient number, since it is larger than the sum of its proper divisors (9002174).

18004342 is an equidigital number, since it uses as much as digits as its factorization.

18004342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9002173.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 18004342 is about 4243.1523658714. The cubic root of 18004342 is about 262.0952104288.

The spelling of 18004342 in words is "eighteen million, four thousand, three hundred forty-two".

Divisors: 1 2 9002171 18004342