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20703 = 367103
BaseRepresentation
bin101000011011111
31001101210
411003133
51130303
6235503
7114234
oct50337
931353
1020703
1114611
12bb93
139567
14778b
156203
hex50df

20703 has 8 divisors (see below), whose sum is σ = 28288. Its totient is φ = 13464.

The previous prime is 20693. The next prime is 20707. The reversal of 20703 is 30702.

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

It is not a de Polignac number, because 20703 - 26 = 20639 is a prime.

It is a super-2 number, since 2×207032 = 857228418, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a nialpdrome in base 12.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 20703.

It is not an unprimeable number, because it can be changed into a prime (20707) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150 + ... + 252.

It is an arithmetic number, because the mean of its divisors is an integer number (3536).

220703 is an apocalyptic number.

20703 is a deficient number, since it is larger than the sum of its proper divisors (7585).

20703 is a wasteful number, since it uses less digits than its factorization.

20703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173.

The product of its (nonzero) digits is 42, while the sum is 12.

The square root of 20703 is about 143.8853710424. The cubic root of 20703 is about 27.4585601751.

Subtracting 20703 from its reverse (30702), we obtain a palindrome (9999).

The spelling of 20703 in words is "twenty thousand, seven hundred three", and thus it is an iban number.

Divisors: 1 3 67 103 201 309 6901 20703