20463 has 8 divisors (see below), whose sum is σ = 28800. Its totient is φ = 12888.

The previous prime is 20443. The next prime is 20477. The reversal of 20463 is 36402.

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

It is not a de Polignac number, because 20463 - 2⁵ = 20431 is a prime.

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 (20443) 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, 123 + ... + 236.

It is an arithmetic number, because the mean of its divisors is an integer number (3600).

2²⁰⁴⁶³ is an apocalyptic number.

20463 is a deficient number, since it is larger than the sum of its proper divisors (8337).

20463 is a wasteful number, since it uses less digits than its factorization.

20463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 20463 is about 143.0489426735. The cubic root of 20463 is about 27.3520428452.

Adding to 20463 its reverse (36402), we get a palindrome (56865).

The spelling of 20463 in words is "twenty thousand, four hundred sixty-three".