20623381063 has 2 divisors, whose sum is σ = 20623381064. Its totient is φ = 20623381062.

The previous prime is 20623381039. The next prime is 20623381081. The reversal of 20623381063 is 36018332602.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20623381063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20623381763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10311690531 + 10311690532.

It is an arithmetic number, because the mean of its divisors is an integer number (10311690532).

Almost surely, 2^20623381063 is an apocalyptic number.

20623381063 is a deficient number, since it is larger than the sum of its proper divisors (1).

20623381063 is an equidigital number, since it uses as much as digits as its factorization.

20623381063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 34.

It can be divided in two parts, 206233 and 81063, that added together give a square (287296 = 536²).

The spelling of 20623381063 in words is "twenty billion, six hundred twenty-three million, three hundred eighty-one thousand, sixty-three".