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20536883387 = 60134171187
BaseRepresentation
bin10011001000000101…
…111111100010111011
31222000020202202210122
4103020011333202323
5314024420232022
613233504403455
71324631425406
oct231005774273
958006682718
1020536883387
1187895984a9
123b9191658b
131c239a4b07
14dcb71cd3d
15802e6c742
hex4c817f8bb

20536883387 has 4 divisors (see below), whose sum is σ = 20571055176. Its totient is φ = 20502711600.

The previous prime is 20536883363. The next prime is 20536883413. The reversal of 20536883387 is 78338863502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78338863502 = 239169431751.

It is a cyclic number.

It is not a de Polignac number, because 20536883387 - 210 = 20536882363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20536883347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17084993 + ... + 17086194.

It is an arithmetic number, because the mean of its divisors is an integer number (5142763794).

Almost surely, 220536883387 is an apocalyptic number.

20536883387 is a deficient number, since it is larger than the sum of its proper divisors (34171789).

20536883387 is an equidigital number, since it uses as much as digits as its factorization.

20536883387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34171788.

The product of its (nonzero) digits is 5806080, while the sum is 53.

The spelling of 20536883387 in words is "twenty billion, five hundred thirty-six million, eight hundred eighty-three thousand, three hundred eighty-seven".

Divisors: 1 601 34171187 20536883387