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18528829 = 11432911
BaseRepresentation
bin100011010101…
…1101000111101
31021212100202221
41012223220331
514220410304
61501045341
7313330624
oct106535075
937770687
1018528829
11a505a90
126256851
133ab9907
1426646bb
151960054
hex11aba3d

18528829 has 12 divisors (see below), whose sum is σ = 20716992. Its totient is φ = 16434600.

The previous prime is 18528751. The next prime is 18528833. The reversal of 18528829 is 92882581.

It is not a de Polignac number, because 18528829 - 27 = 18528701 is a prime.

It is a super-2 number, since 2×185288292 = 686635008222482, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a pancake number, because a pancake can be divided into 18528829 parts by 6087 straight cuts.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18528899) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19884 + ... + 20794.

It is an arithmetic number, because the mean of its divisors is an integer number (1726416).

Almost surely, 218528829 is an apocalyptic number.

It is an amenable number.

18528829 is a deficient number, since it is larger than the sum of its proper divisors (2188163).

18528829 is an equidigital number, since it uses as much as digits as its factorization.

18528829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008 (or 965 counting only the distinct ones).

The product of its digits is 92160, while the sum is 43.

The square root of 18528829 is about 4304.5126321106. The cubic root of 18528829 is about 264.6159334925.

The spelling of 18528829 in words is "eighteen million, five hundred twenty-eight thousand, eight hundred twenty-nine".

Divisors: 1 11 43 473 911 1849 10021 20339 39173 430903 1684439 18528829