20616463 has 16 divisors (see below), whose sum is σ = 24928000. Its totient is φ = 16656192.

The previous prime is 20616451. The next prime is 20616473. The reversal of 20616463 is 36461602.

It is not a de Polignac number, because 20616463 - 2¹³ = 20608271 is a prime.

It is a taxicab number since it can be written as a sum of two cubes in more than one way. Here 20616463 = 111³ + 268³ = 151³ + 258³.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20616413) 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 15 ways as a sum of consecutive naturals, for example, 50203 + ... + 50611.

It is an arithmetic number, because the mean of its divisors is an integer number (1558000).

Almost surely, 2^20616463 is an apocalyptic number.

20616463 is a deficient number, since it is larger than the sum of its proper divisors (4311537).

20616463 is a wasteful number, since it uses less digits than its factorization.

20616463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 20616463 is about 4540.5355411009. The cubic root of 20616463 is about 274.2024849910.

The spelling of 20616463 in words is "twenty million, six hundred sixteen thousand, four hundred sixty-three".