20046656663 has 4 divisors (see below), whose sum is σ = 21869080008. Its totient is φ = 18224233320.

The previous prime is 20046656639. The next prime is 20046656681. The reversal of 20046656663 is 36665664002.

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 20046656663 - 2²² = 20042462359 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 (20046653663) 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, 911211656 + ... + 911211677.

It is an arithmetic number, because the mean of its divisors is an integer number (5467270002).

Almost surely, 2^20046656663 is an apocalyptic number.

20046656663 is a deficient number, since it is larger than the sum of its proper divisors (1822423345).

20046656663 is a wasteful number, since it uses less digits than its factorization.

20046656663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1822423344.

The product of its (nonzero) digits is 933120, while the sum is 44.

The spelling of 20046656663 in words is "twenty billion, forty-six million, six hundred fifty-six thousand, six hundred sixty-three".