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18663088198 = 29331544099
BaseRepresentation
bin10001011000011010…
…000010000001000110
31210011122220010000211
4101120122002001012
5301210222310243
612323530430034
71230326426566
oct213032020106
953148803024
1018663088198
117a07910437
12374a29231a
1319b5717971
14c90916da6
157436d8d9d
hex458682046

18663088198 has 4 divisors (see below), whose sum is σ = 27994632300. Its totient is φ = 9331544098.

The previous prime is 18663088159. The next prime is 18663088247. The reversal of 18663088198 is 89188036681.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×186630881982 (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4665772048 + ... + 4665772051.

It is an arithmetic number, because the mean of its divisors is an integer number (6998658075).

Almost surely, 218663088198 is an apocalyptic number.

18663088198 is a deficient number, since it is larger than the sum of its proper divisors (9331544102).

18663088198 is an equidigital number, since it uses as much as digits as its factorization.

18663088198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9331544101.

The product of its (nonzero) digits is 3981312, while the sum is 58.

The spelling of 18663088198 in words is "eighteen billion, six hundred sixty-three million, eighty-eight thousand, one hundred ninety-eight".

Divisors: 1 2 9331544099 18663088198