Search a number
-
+
18159680 = 265711267
BaseRepresentation
bin100010101000…
…1100001000000
31021011121101202
41011101201000
514122102210
61445120332
7310232450
oct105214100
937147352
1018159680
11a283700
1260b90a8
1339ba896
1425a9d60
1518da9a5
hex1151840

18159680 has 168 divisors, whose sum is σ = 55132224. Its totient is φ = 5575680.

The previous prime is 18159671. The next prime is 18159683. The reversal of 18159680 is 8695181.

It is not an unprimeable number, because it can be changed into a prime (18159683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 271007 + ... + 271073.

It is an arithmetic number, because the mean of its divisors is an integer number (328168).

Almost surely, 218159680 is an apocalyptic number.

18159680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18159680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27566112).

18159680 is an abundant number, since it is smaller than the sum of its proper divisors (36972544).

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

18159680 is a wasteful number, since it uses less digits than its factorization.

18159680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113 (or 92 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 38.

The square root of 18159680 is about 4261.4176045067. The cubic root of 18159680 is about 262.8468219910.

The spelling of 18159680 in words is "eighteen million, one hundred fifty-nine thousand, six hundred eighty".