20746216063 has 4 divisors (see below), whose sum is σ = 21228686248. Its totient is φ = 20263745880.

The previous prime is 20746216061. The next prime is 20746216081. The reversal of 20746216063 is 36061264702.

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 20746216063 - 2¹ = 20746216061 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 (20746216061) 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, 241235028 + ... + 241235113.

It is an arithmetic number, because the mean of its divisors is an integer number (5307171562).

Almost surely, 2^20746216063 is an apocalyptic number.

20746216063 is a deficient number, since it is larger than the sum of its proper divisors (482470185).

20746216063 is an equidigital number, since it uses as much as digits as its factorization.

20746216063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482470184.

The product of its (nonzero) digits is 72576, while the sum is 37.

The spelling of 20746216063 in words is "twenty billion, seven hundred forty-six million, two hundred sixteen thousand, sixty-three".