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20160087 = 3531031231
BaseRepresentation
bin100110011100…
…1111001010111
31101221020102220
41030321321113
520130110322
62000033423
7333233523
oct114717127
941836386
1020160087
111041a632
126902873
13423b25c
14296ad83
151b8355c
hex1339e57

20160087 has 16 divisors (see below), whose sum is σ = 27675648. Its totient is φ = 13047840.

The previous prime is 20160067. The next prime is 20160139. The reversal of 20160087 is 78006102.

It is not a de Polignac number, because 20160087 - 222 = 15965783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20160037) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15762 + ... + 16992.

It is an arithmetic number, because the mean of its divisors is an integer number (1729728).

Almost surely, 220160087 is an apocalyptic number.

20160087 is a deficient number, since it is larger than the sum of its proper divisors (7515561).

20160087 is a wasteful number, since it uses less digits than its factorization.

20160087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 20160087 is about 4489.9985523383. The cubic root of 20160087 is about 272.1640761429.

Adding to 20160087 its reverse (78006102), we get a palindrome (98166189).

The spelling of 20160087 in words is "twenty million, one hundred sixty thousand, eighty-seven".

Divisors: 1 3 53 103 159 309 1231 3693 5459 16377 65243 126793 195729 380379 6720029 20160087