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20509082 = 211932231
BaseRepresentation
bin100111000111…
…1000110011010
31102120222011122
41032033012122
520222242312
62011325242
7336216146
oct116170632
942528148
1020509082
1110638860
126a50822
134331069
142a1c226
151c01b72
hex138f19a

20509082 has 8 divisors (see below), whose sum is σ = 33560352. Its totient is φ = 9322300.

The previous prime is 20509081. The next prime is 20509109. The reversal of 20509082 is 28090502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20509081) 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 3 ways as a sum of consecutive naturals, for example, 466094 + ... + 466137.

It is an arithmetic number, because the mean of its divisors is an integer number (4195044).

Almost surely, 220509082 is an apocalyptic number.

20509082 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20509082 is a deficient number, since it is larger than the sum of its proper divisors (13051270).

20509082 is a wasteful number, since it uses less digits than its factorization.

20509082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 932244.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 20509082 is about 4528.6953971315. The cubic root of 20509082 is about 273.7255941768.

Adding to 20509082 its reverse (28090502), we get a palindrome (48599584).

The spelling of 20509082 in words is "twenty million, five hundred nine thousand, eighty-two".

Divisors: 1 2 11 22 932231 1864462 10254541 20509082