20731063 has 4 divisors (see below), whose sum is σ = 21291400. Its totient is φ = 20170728.

The previous prime is 20731057. The next prime is 20731069. The reversal of 20731063 is 36013702.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (20731057) and next prime (20731069).

It is a cyclic number.

It is not a de Polignac number, because 20731063 - 2⁹ = 20730551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20731069) 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, 280113 + ... + 280186.

It is an arithmetic number, because the mean of its divisors is an integer number (5322850).

Almost surely, 2^20731063 is an apocalyptic number.

20731063 is a deficient number, since it is larger than the sum of its proper divisors (560337).

20731063 is an equidigital number, since it uses as much as digits as its factorization.

20731063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560336.

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

The square root of 20731063 is about 4553.1377093165. The cubic root of 20731063 is about 274.7096130323.

Adding to 20731063 its reverse (36013702), we get a palindrome (56744765).

It can be divided in two parts, 2073 and 1063, that added together give a square (3136 = 56²).

The spelling of 20731063 in words is "twenty million, seven hundred thirty-one thousand, sixty-three".