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18249398009 = 1011093165313
BaseRepresentation
bin10000111111101111…
…111011011011111001
31202002211110110202222
4100333233323123321
5244333321214014
612214511533425
71214144216003
oct207757733371
952084413688
1018249398009
117815344917
12365382a275
13194aac1c7b
14c519cb373
1571c21e08e
hex43fbfb6f9

18249398009 has 8 divisors (see below), whose sum is σ = 18447058632. Its totient is φ = 18052070400.

The previous prime is 18249398003. The next prime is 18249398033. The reversal of 18249398009 is 90089394281.

It can be written as a sum of positive squares in 4 ways, for example, as 6281038009 + 11968360000 = 79253^2 + 109400^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 18249398009 - 212 = 18249393913 is a prime.

It is a super-3 number, since 3×182493980093 (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18249398003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27737 + ... + 193049.

It is an arithmetic number, because the mean of its divisors is an integer number (2305882329).

Almost surely, 218249398009 is an apocalyptic number.

It is an amenable number.

18249398009 is a deficient number, since it is larger than the sum of its proper divisors (197660623).

18249398009 is a wasteful number, since it uses less digits than its factorization.

18249398009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166507.

The product of its (nonzero) digits is 1119744, while the sum is 53.

The spelling of 18249398009 in words is "eighteen billion, two hundred forty-nine million, three hundred ninety-eight thousand, nine".

Divisors: 1 101 1093 110393 165313 16696613 180687109 18249398009