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18057930528 = 2531131619043
BaseRepresentation
bin10000110100010101…
…100010011100100000
31201121111011220202210
4100310111202130200
5243440312234103
612143512042120
71206330606531
oct206425423440
951544156683
1018057930528
11772725a530
1235bb693340
13191a2345c1
14c343ca688
1570a4ece03
hex434562720

18057930528 has 192 divisors, whose sum is σ = 54260527104. Its totient is φ = 5208192000.

The previous prime is 18057930493. The next prime is 18057930529. The reversal of 18057930528 is 82503975081.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (18057930529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1992375 + ... + 2001417.

It is an arithmetic number, because the mean of its divisors is an integer number (282606912).

Almost surely, 218057930528 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18057930528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27130263552).

18057930528 is an abundant number, since it is smaller than the sum of its proper divisors (36202596576).

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

18057930528 is a wasteful number, since it uses less digits than its factorization.

18057930528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9159 (or 9151 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 48.

The spelling of 18057930528 in words is "eighteen billion, fifty-seven million, nine hundred thirty thousand, five hundred twenty-eight".