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18079642332 = 22321660730241
BaseRepresentation
bin10000110101101000…
…010111001011011100
31201200000000222202200
4100311220113023130
5244011342023312
612150005251500
71210013265333
oct206550271334
951600028680
1018079642332
117738539974
123606a03b90
131921896c1b
14c3723cd1a
1570c38b0dc
hex435a172dc

18079642332 has 36 divisors (see below), whose sum is σ = 45705581376. Its totient is φ = 6025985280.

The previous prime is 18079642303. The next prime is 18079642333. The reversal of 18079642332 is 23324697081.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18079642333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 582732 + ... + 612972.

Almost surely, 218079642332 is an apocalyptic number.

18079642332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18079642332 is an abundant number, since it is smaller than the sum of its proper divisors (27625939044).

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

18079642332 is a wasteful number, since it uses less digits than its factorization.

18079642332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46858 (or 46853 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 18079642332 in words is "eighteen billion, seventy-nine million, six hundred forty-two thousand, three hundred thirty-two".

Divisors: 1 2 3 4 6 9 12 18 36 16607 30241 33214 49821 60482 66428 90723 99642 120964 149463 181446 199284 272169 298926 362892 544338 597852 1088676 502212287 1004424574 1506636861 2008849148 3013273722 4519910583 6026547444 9039821166 18079642332