20971063 has 2 divisors, whose sum is σ = 20971064. Its totient is φ = 20971062.

The previous prime is 20971051. The next prime is 20971121. The reversal of 20971063 is 36017902.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20971063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20971043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10485531 + 10485532.

It is an arithmetic number, because the mean of its divisors is an integer number (10485532).

Almost surely, 2^20971063 is an apocalyptic number.

20971063 is a deficient number, since it is larger than the sum of its proper divisors (1).

20971063 is an equidigital number, since it uses as much as digits as its factorization.

20971063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 20971063 is about 4579.4173210137. The cubic root of 20971063 is about 275.7656371832.

Adding to 20971063 its reverse (36017902), we get a palindrome (56988965).

It can be divided in two parts, 2097 and 1063, that added together give a triangular number (3160 = T₇₉).

The spelling of 20971063 in words is "twenty million, nine hundred seventy-one thousand, sixty-three".