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18769244680 = 235469231117
BaseRepresentation
bin10001011110101110…
…111111001000001000
31210110001122102100101
4101132232333020020
5301414411312210
612342242015144
71233055642654
oct213656771010
953401572311
1018769244680
117a6182736a
1237799474b4
131a01705754
14ca0a6ba64
1574cba7a3a
hex45ebbf208

18769244680 has 16 divisors (see below), whose sum is σ = 42230800620. Its totient is φ = 7507697856.

The previous prime is 18769244647. The next prime is 18769244749. The reversal of 18769244680 is 8644296781.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16971315076 + 1797929604 = 130274^2 + 42402^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234615519 + ... + 234615598.

Almost surely, 218769244680 is an apocalyptic number.

18769244680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18769244680 is an abundant number, since it is smaller than the sum of its proper divisors (23461555940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18769244680 is a wasteful number, since it uses less digits than its factorization.

18769244680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469231128 (or 469231124 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 55.

The spelling of 18769244680 in words is "eighteen billion, seven hundred sixty-nine million, two hundred forty-four thousand, six hundred eighty".

Divisors: 1 2 4 5 8 10 20 40 469231117 938462234 1876924468 2346155585 3753848936 4692311170 9384622340 18769244680