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18182825 = 52727313
BaseRepresentation
bin100010101011…
…1001010101001
31021012210010222
41011113022221
514123322300
61445415425
7310360103
oct105271251
937183128
1018182825
11a29a031
12610a575
1339c828b
1425b4573
1518e2785
hex11572a9

18182825 has 6 divisors (see below), whose sum is σ = 22546734. Its totient is φ = 14546240.

The previous prime is 18182821. The next prime is 18182837. The reversal of 18182825 is 52828181.

It can be written as a sum of positive squares in 3 ways, for example, as 179776 + 18003049 = 424^2 + 4243^2 .

It is not a de Polignac number, because 18182825 - 22 = 18182821 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18182821) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 363632 + ... + 363681.

It is an arithmetic number, because the mean of its divisors is an integer number (3757789).

Almost surely, 218182825 is an apocalyptic number.

It is an amenable number.

18182825 is a deficient number, since it is larger than the sum of its proper divisors (4363909).

18182825 is an equidigital number, since it uses as much as digits as its factorization.

18182825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727323 (or 727318 counting only the distinct ones).

The product of its digits is 10240, while the sum is 35.

The square root of 18182825 is about 4264.1323853745. The cubic root of 18182825 is about 262.9584430283.

The spelling of 18182825 in words is "eighteen million, one hundred eighty-two thousand, eight hundred twenty-five".

Divisors: 1 5 25 727313 3636565 18182825