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20206117 = 48741491
BaseRepresentation
bin100110100010…
…1001000100101
31102000120120201
41031011020211
520133043432
62001030501
7333514651
oct115051045
942016521
1020206117
1110451178
126925431
1342561a9
14297da61
151b91ee7
hex1345225

20206117 has 4 divisors (see below), whose sum is σ = 20248096. Its totient is φ = 20164140.

The previous prime is 20206097. The next prime is 20206129. The reversal of 20206117 is 71160202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71160202 = 235580101.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-20206117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20206094 and 20206103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20206187) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20259 + ... + 21232.

It is an arithmetic number, because the mean of its divisors is an integer number (5062024).

Almost surely, 220206117 is an apocalyptic number.

It is an amenable number.

20206117 is a deficient number, since it is larger than the sum of its proper divisors (41979).

20206117 is an equidigital number, since it uses as much as digits as its factorization.

20206117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41978.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 20206117 is about 4495.1214666569. The cubic root of 20206117 is about 272.3710559040.

Adding to 20206117 its reverse (71160202), we get a palindrome (91366319).

The spelling of 20206117 in words is "twenty million, two hundred six thousand, one hundred seventeen".

Divisors: 1 487 41491 20206117