20307163 has 12 divisors (see below), whose sum is σ = 22325040. Its totient is φ = 18445952.

The previous prime is 20307121. The next prime is 20307179. The reversal of 20307163 is 36170302.

It is not a de Polignac number, because 20307163 - 2⁹ = 20306651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20307103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7170 + ... + 9592.

It is an arithmetic number, because the mean of its divisors is an integer number (1860420).

Almost surely, 2^20307163 is an apocalyptic number.

20307163 is a deficient number, since it is larger than the sum of its proper divisors (2017877).

20307163 is a wasteful number, since it uses less digits than its factorization.

20307163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2486 (or 2469 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 22.

The square root of 20307163 is about 4506.3469684435. The cubic root of 20307163 is about 272.8243222051.

Adding to 20307163 its reverse (36170302), we get a palindrome (56477465).

The spelling of 20307163 in words is "twenty million, three hundred seven thousand, one hundred sixty-three".