20465163 has 16 divisors (see below), whose sum is σ = 30965760. Its totient is φ = 13352328.

The previous prime is 20465149. The next prime is 20465189. The reversal of 20465163 is 36156402.

20465163 is a `hidden beast` number, since 2 + 0 + 4 + 651 + 6 + 3 = 666.

It is not a de Polignac number, because 20465163 - 2⁵ = 20465131 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20465113) 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, 6795 + ... + 9332.

It is an arithmetic number, because the mean of its divisors is an integer number (1935360).

Almost surely, 2^20465163 is an apocalyptic number.

20465163 is a deficient number, since it is larger than the sum of its proper divisors (10500597).

20465163 is a wasteful number, since it uses less digits than its factorization.

20465163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16183 (or 16177 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 20465163 is about 4523.8438301957. The cubic root of 20465163 is about 273.5300654205.

The spelling of 20465163 in words is "twenty million, four hundred sixty-five thousand, one hundred sixty-three".