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18818764 = 227975903
BaseRepresentation
bin100011111001…
…0011011001100
31022102002111021
41013302123030
514304200024
61511203524
7315646126
oct107623314
938362437
1018818764
11a6938a8
1263765a4
133b8b883
1426dc216
1519bade4
hex11f26cc

18818764 has 12 divisors (see below), whose sum is σ = 32979744. Its totient is φ = 9395984.

The previous prime is 18818749. The next prime is 18818771. The reversal of 18818764 is 46781881.

It is a self number, because there is not a number n which added to its sum of digits gives 18818764.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 237 + ... + 6139.

It is an arithmetic number, because the mean of its divisors is an integer number (2748312).

Almost surely, 218818764 is an apocalyptic number.

It is an amenable number.

18818764 is a deficient number, since it is larger than the sum of its proper divisors (14160980).

18818764 is a wasteful number, since it uses less digits than its factorization.

18818764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6704 (or 6702 counting only the distinct ones).

The product of its digits is 86016, while the sum is 43.

The square root of 18818764 is about 4338.0599350401. The cubic root of 18818764 is about 265.9890134343.

The spelling of 18818764 in words is "eighteen million, eight hundred eighteen thousand, seven hundred sixty-four".

Divisors: 1 2 4 797 1594 3188 5903 11806 23612 4704691 9409382 18818764