20612126063 has 4 divisors (see below), whose sum is σ = 20625034440. Its totient is φ = 20599217688.

The previous prime is 20612126057. The next prime is 20612126107. The reversal of 20612126063 is 36062121602.

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 20612126063 - 2¹⁸ = 20611863919 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 (20612126363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6451793 + ... + 6454986.

It is an arithmetic number, because the mean of its divisors is an integer number (5156258610).

Almost surely, 2^20612126063 is an apocalyptic number.

20612126063 is a deficient number, since it is larger than the sum of its proper divisors (12908377).

20612126063 is a wasteful number, since it uses less digits than its factorization.

20612126063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12908376.

The product of its (nonzero) digits is 5184, while the sum is 29.

Adding to 20612126063 its reverse (36062121602), we get a palindrome (56674247665).

The spelling of 20612126063 in words is "twenty billion, six hundred twelve million, one hundred twenty-six thousand, sixty-three".