20533463 has 4 divisors (see below), whose sum is σ = 20640048. Its totient is φ = 20426880.

The previous prime is 20533459. The next prime is 20533477. The reversal of 20533463 is 36433502.

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

It is a cyclic number.

It is not a de Polignac number, because 20533463 - 2² = 20533459 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20533063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53003 + ... + 53388.

It is an arithmetic number, because the mean of its divisors is an integer number (5160012).

Almost surely, 2^20533463 is an apocalyptic number.

20533463 is a deficient number, since it is larger than the sum of its proper divisors (106585).

20533463 is a wasteful number, since it uses less digits than its factorization.

20533463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106584.

The product of its (nonzero) digits is 6480, while the sum is 26.

The square root of 20533463 is about 4531.3864324288. The cubic root of 20533463 is about 273.8340186772.

Adding to 20533463 its reverse (36433502), we get a palindrome (56966965).

The spelling of 20533463 in words is "twenty million, five hundred thirty-three thousand, four hundred sixty-three".