20476 has 6 divisors (see below), whose sum is σ = 35840. Its totient is φ = 10236.

The previous prime is 20443. The next prime is 20477. The reversal of 20476 is 67402.

20476 is nontrivially palindromic in base 8.

It is a plaindrome in base 6.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2556 + ... + 2563.

2²⁰⁴⁷⁶ is an apocalyptic number.

20476 is the 91-st centered pentagonal number.

It is an amenable number.

20476 is a deficient number, since it is larger than the sum of its proper divisors (15364).

20476 is a wasteful number, since it uses less digits than its factorization.

20476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5123 (or 5121 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 20476 is about 143.0943744527. The cubic root of 20476 is about 27.3578338059.

Adding to 20476 its reverse (67402), we get a palindrome (87878).

It can be divided in two parts, 20 and 476, that added together give a triangular number (496 = T₃₁).

The spelling of 20476 in words is "twenty thousand, four hundred seventy-six".