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20127 = 36709
BaseRepresentation
bin100111010011111
31000121110
410322133
51121002
6233103
7112452
oct47237
930543
1020127
1114138
12b793
139213
147499
155e6c
hex4e9f

20127 has 4 divisors (see below), whose sum is σ = 26840. Its totient is φ = 13416.

The previous prime is 20123. The next prime is 20129. The reversal of 20127 is 72102.

Adding to 20127 its reverse (72102), we get a palindrome (92229).

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20127 - 22 = 20123 is a prime.

It is a super-2 number, since 2×201272 = 810192258, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123) 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, 3352 + ... + 3357.

It is an arithmetic number, because the mean of its divisors is an integer number (6710).

220127 is an apocalyptic number.

20127 is a deficient number, since it is larger than the sum of its proper divisors (6713).

20127 is an equidigital number, since it uses as much as digits as its factorization.

20127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6712.

The product of its (nonzero) digits is 28, while the sum is 12.

The square root of 20127 is about 141.8696584898. The cubic root of 20127 is about 27.2015101526.

The spelling of 20127 in words is "twenty thousand, one hundred twenty-seven", and thus it is an iban number.

Divisors: 1 3 6709 20127