20701 has 4 divisors (see below), whose sum is σ = 20992. Its totient is φ = 20412.

The previous prime is 20693. The next prime is 20707. The reversal of 20701 is 10702.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 10702 = 2 ⋅5351.

It is a cyclic number.

It is not a de Polignac number, because 20701 - 2³ = 20693 is a prime.

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 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 3 ways as a sum of consecutive naturals, for example, 46 + ... + 208.

It is an arithmetic number, because the mean of its divisors is an integer number (5248).

2²⁰⁷⁰¹ is an apocalyptic number.

It is an amenable number.

20701 is a deficient number, since it is larger than the sum of its proper divisors (291).

20701 is a wasteful number, since it uses less digits than its factorization.

20701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290.

The product of its (nonzero) digits is 14, while the sum is 10.

The square root of 20701 is about 143.8784208976. The cubic root of 20701 is about 27.4576759411.

Subtracting from 20701 its reverse (10702), we obtain a palindrome (9999).

The spelling of 20701 in words is "twenty thousand, seven hundred one", and thus it is an iban number.