20613163 has 8 divisors (see below), whose sum is σ = 21874320. Its totient is φ = 19357440.

The previous prime is 20613149. The next prime is 20613167. The reversal of 20613163 is 36131602.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20613163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20613167) 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 in 7 ways as a sum of consecutive naturals, for example, 8608 + ... + 10738.

It is an arithmetic number, because the mean of its divisors is an integer number (2734290).

Almost surely, 2^20613163 is an apocalyptic number.

20613163 is a deficient number, since it is larger than the sum of its proper divisors (1261157).

20613163 is a wasteful number, since it uses less digits than its factorization.

20613163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2717.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 20613163 is about 4540.1721333007. The cubic root of 20613163 is about 274.1878540222.

Adding to 20613163 its reverse (36131602), we get a palindrome (56744765).

The spelling of 20613163 in words is "twenty million, six hundred thirteen thousand, one hundred sixty-three".