Search a number
-
+
18135760 = 245226697
BaseRepresentation
bin100010100101…
…1101011010000
31021010101120211
41011023223100
514120321020
61444413504
7310102636
oct105135320
937111524
1018135760
11a267735
1260a7294
1339aca26
1425a1356
1518d385a
hex114bad0

18135760 has 20 divisors (see below), whose sum is σ = 42165828. Its totient is φ = 7254272.

The previous prime is 18135757. The next prime is 18135773. The reversal of 18135760 is 6753181.

It can be written as a sum of positive squares in 2 ways, for example, as 14167696 + 3968064 = 3764^2 + 1992^2 .

It is a tau number, because it is divible by the number of its divisors (20).

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 in 3 ways as a sum of consecutive naturals, for example, 113269 + ... + 113428.

Almost surely, 218135760 is an apocalyptic number.

18135760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18135760 is an abundant number, since it is smaller than the sum of its proper divisors (24030068).

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

18135760 is a wasteful number, since it uses less digits than its factorization.

18135760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226710 (or 226704 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 18135760 is about 4258.6101018994. The cubic root of 18135760 is about 262.7313636688.

The spelling of 18135760 in words is "eighteen million, one hundred thirty-five thousand, seven hundred sixty".

Divisors: 1 2 4 5 8 10 16 20 40 80 226697 453394 906788 1133485 1813576 2266970 3627152 4533940 9067880 18135760