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18297029 = 234119403
BaseRepresentation
bin100010111001…
…1000011000101
31021102120210202
41011303003011
514141001104
61452100245
7311344052
oct105630305
937376722
1018297029
11a367913
126164685
133a3825a
142604029
15191651e
hex11730c5

18297029 has 8 divisors (see below), whose sum is σ = 19559232. Its totient is φ = 17073760.

The previous prime is 18297001. The next prime is 18297043. The reversal of 18297029 is 92079281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-18297029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18296983 and 18297001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18297089) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 8759 + ... + 10644.

It is an arithmetic number, because the mean of its divisors is an integer number (2444904).

Almost surely, 218297029 is an apocalyptic number.

It is an amenable number.

18297029 is a deficient number, since it is larger than the sum of its proper divisors (1262203).

18297029 is a wasteful number, since it uses less digits than its factorization.

18297029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19467.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 18297029 is about 4277.5026592628. The cubic root of 18297029 is about 263.5078305424.

The spelling of 18297029 in words is "eighteen million, two hundred ninety-seven thousand, twenty-nine".

Divisors: 1 23 41 943 19403 446269 795523 18297029