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18679371359 = 115872892887
BaseRepresentation
bin10001011001011000…
…001001011001011111
31210012210112101022212
4101121120021121133
5301223404340414
612325311431035
71230615015425
oct213130113137
953183471285
1018679371359
117a160221a0
12375382547b
1319b8bc937c
14c92b55115
15744d5383e
hex45960965f

18679371359 has 8 divisors (see below), whose sum is σ = 20412217728. Its totient is φ = 16952311960.

The previous prime is 18679371247. The next prime is 18679371391. The reversal of 18679371359 is 95317397681.

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 18679371359 - 220 = 18678322783 is a prime.

It is a super-3 number, since 3×186793713593 (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18679371298 and 18679371307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18679371559) 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 in 7 ways as a sum of consecutive naturals, for example, 1439987 + ... + 1452900.

It is an arithmetic number, because the mean of its divisors is an integer number (2551527216).

Almost surely, 218679371359 is an apocalyptic number.

18679371359 is a deficient number, since it is larger than the sum of its proper divisors (1732846369).

18679371359 is a wasteful number, since it uses less digits than its factorization.

18679371359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2893485.

The product of its digits is 8573040, while the sum is 59.

The spelling of 18679371359 in words is "eighteen billion, six hundred seventy-nine million, three hundred seventy-one thousand, three hundred fifty-nine".

Divisors: 1 11 587 6457 2892887 31821757 1698124669 18679371359