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18304986023 = 191516380267
BaseRepresentation
bin10001000011000011…
…111110101110100111
31202020201001122012022
4101003003332232213
5244442034023043
612224215213355
71215420546122
oct210303765647
952221048168
1018304986023
117843761a25
12366a37725b
13195948599c
14c5913b3b9
1572204e868
hex4430feba7

18304986023 has 8 divisors (see below), whose sum is σ = 19396014720. Its totient is φ = 17226718200.

The previous prime is 18304986017. The next prime is 18304986043. The reversal of 18304986023 is 32068940381.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-18304986023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18304986043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3187265 + ... + 3193002.

It is an arithmetic number, because the mean of its divisors is an integer number (2424501840).

Almost surely, 218304986023 is an apocalyptic number.

18304986023 is a deficient number, since it is larger than the sum of its proper divisors (1091028697).

18304986023 is a wasteful number, since it uses less digits than its factorization.

18304986023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6380437.

The product of its (nonzero) digits is 248832, while the sum is 44.

The spelling of 18304986023 in words is "eighteen billion, three hundred four million, nine hundred eighty-six thousand, twenty-three".

Divisors: 1 19 151 2869 6380267 121225073 963420317 18304986023