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18325193792 = 261725765537
BaseRepresentation
bin10001000100010001…
…000100010001000000
31202022010002022001012
4101010101010101000
5300012222200132
612230220300052
71216054401653
oct210421042100
952263068035
1018325193792
117854104364
1236750a1628
13196070c849
14c5babb89a
15723be20b2
hex444444440

18325193792 has 56 divisors (see below), whose sum is σ = 38653525944. Its totient is φ = 8589934592.

The previous prime is 18325193693. The next prime is 18325193801. The reversal of 18325193792 is 29739152381.

It can be written as a sum of positive squares in 4 ways, for example, as 16605930496 + 1719263296 = 128864^2 + 41464^2 .

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 18325193792.

It is an unprimeable number.

In principle, a polygon with 18325193792 sides can be constructed with ruler and compass.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246848 + ... + 312384.

Almost surely, 218325193792 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 18325193792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19326762972).

18325193792 is an abundant number, since it is smaller than the sum of its proper divisors (20328332152).

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

18325193792 is a wasteful number, since it uses less digits than its factorization.

18325193792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65823 (or 65813 counting only the distinct ones).

The product of its digits is 816480, while the sum is 50.

The spelling of 18325193792 in words is "eighteen billion, three hundred twenty-five million, one hundred ninety-three thousand, seven hundred ninety-two".