20407163 has 4 divisors (see below), whose sum is σ = 23322480. Its totient is φ = 17491848.

The previous prime is 20407129. The next prime is 20407181. The reversal of 20407163 is 36170402.

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 20407163 - 2⁶ = 20407099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20407103) 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, 1457648 + ... + 1457661.

It is an arithmetic number, because the mean of its divisors is an integer number (5830620).

Almost surely, 2^20407163 is an apocalyptic number.

20407163 is a deficient number, since it is larger than the sum of its proper divisors (2915317).

20407163 is an equidigital number, since it uses as much as digits as its factorization.

20407163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2915316.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 20407163 is about 4517.4288040876. The cubic root of 20407163 is about 273.2714184900.

Adding to 20407163 its reverse (36170402), we get a palindrome (56577565).

The spelling of 20407163 in words is "twenty million, four hundred seven thousand, one hundred sixty-three".