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18682230563889 = 36227410187963
BaseRepresentation
bin1000011111101110010111…
…01101110110010000110001
32110011000002202210011121020
410033313023231312100301
54422042202011021024
6103422255341450053
73635514042440064
oct417671355662061
973130082704536
1018682230563889
115a530a9121562
1221188a9270929
13a5695a984b79
14488320b428db
15225e7ae4c979
hex10fdcbb76431

18682230563889 has 4 divisors (see below), whose sum is σ = 24909640751856. Its totient is φ = 12454820375924.

The previous prime is 18682230563851. The next prime is 18682230563923. The reversal of 18682230563889 is 98836503228681.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18682230563889 - 228 = 18681962128433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18682230563819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3113705093979 + ... + 3113705093984.

It is an arithmetic number, because the mean of its divisors is an integer number (6227410187964).

Almost surely, 218682230563889 is an apocalyptic number.

It is an amenable number.

18682230563889 is a deficient number, since it is larger than the sum of its proper divisors (6227410187967).

18682230563889 is an equidigital number, since it uses as much as digits as its factorization.

18682230563889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6227410187966.

The product of its (nonzero) digits is 238878720, while the sum is 69.

The spelling of 18682230563889 in words is "eighteen trillion, six hundred eighty-two billion, two hundred thirty million, five hundred sixty-three thousand, eight hundred eighty-nine".

Divisors: 1 3 6227410187963 18682230563889