20430163 has 4 divisors (see below), whose sum is σ = 22001728. Its totient is φ = 18858600.

The previous prime is 20430143. The next prime is 20430167. The reversal of 20430163 is 36103402.

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 20430163 - 2⁵ = 20430131 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20430163.

It is not an unprimeable number, because it can be changed into a prime (20430167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 785763 + ... + 785788.

It is an arithmetic number, because the mean of its divisors is an integer number (5500432).

Almost surely, 2^20430163 is an apocalyptic number.

20430163 is a deficient number, since it is larger than the sum of its proper divisors (1571565).

20430163 is a wasteful number, since it uses less digits than its factorization.

20430163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1571564.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 20430163 is about 4519.9737831098. The cubic root of 20430163 is about 273.3740439395.

Adding to 20430163 its reverse (36103402), we get a palindrome (56533565).

The spelling of 20430163 in words is "twenty million, four hundred thirty thousand, one hundred sixty-three".