20563167 has 16 divisors (see below), whose sum is σ = 27941760. Its totient is φ = 13449312.

The previous prime is 20563163. The next prime is 20563189. The reversal of 20563167 is 76136502.

It is not a de Polignac number, because 20563167 - 2² = 20563163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20563163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66828 + ... + 67134.

It is an arithmetic number, because the mean of its divisors is an integer number (1746360).

Almost surely, 2^20563167 is an apocalyptic number.

20563167 is a deficient number, since it is larger than the sum of its proper divisors (7378593).

20563167 is a wasteful number, since it uses less digits than its factorization.

20563167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 20563167 is about 4534.6628320086. The cubic root of 20563167 is about 273.9659991198.

Adding to 20563167 its reverse (76136502), we get a palindrome (96699669).

The spelling of 20563167 in words is "twenty million, five hundred sixty-three thousand, one hundred sixty-seven".