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18382929281 is a prime number
BaseRepresentation
bin10001000111101101…
…010011110110000001
31202110010201120020122
4101013231103312001
5300122012214111
612240041550025
71220355215003
oct210755236601
952403646218
1018382929281
117883758942
1236904a5315
13196c675b62
14c6562a373
15728ce8cdb
hex447b53d81

18382929281 has 2 divisors, whose sum is σ = 18382929282. Its totient is φ = 18382929280.

The previous prime is 18382929251. The next prime is 18382929337. The reversal of 18382929281 is 18292928381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17695650625 + 687278656 = 133025^2 + 26216^2 .

It is a cyclic number.

It is not a de Polignac number, because 18382929281 - 26 = 18382929217 is a prime.

It is a super-2 number, since 2×183829292812 (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18382929251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9191464640 + 9191464641.

It is an arithmetic number, because the mean of its divisors is an integer number (9191464641).

Almost surely, 218382929281 is an apocalyptic number.

It is an amenable number.

18382929281 is a deficient number, since it is larger than the sum of its proper divisors (1).

18382929281 is an equidigital number, since it uses as much as digits as its factorization.

18382929281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 995328, while the sum is 53.

The spelling of 18382929281 in words is "eighteen billion, three hundred eighty-two million, nine hundred twenty-nine thousand, two hundred eighty-one".