20516477063 has 4 divisors (see below), whose sum is σ = 20797524768. Its totient is φ = 20235429360.

The previous prime is 20516477057. The next prime is 20516477117. The reversal of 20516477063 is 36077461502.

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 20516477063 - 2⁸ = 20516476807 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20516477063.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20516477563) 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, 140523743 + ... + 140523888.

It is an arithmetic number, because the mean of its divisors is an integer number (5199381192).

Almost surely, 2^20516477063 is an apocalyptic number.

20516477063 is a deficient number, since it is larger than the sum of its proper divisors (281047705).

20516477063 is an equidigital number, since it uses as much as digits as its factorization.

20516477063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281047704.

The product of its (nonzero) digits is 211680, while the sum is 41.

The spelling of 20516477063 in words is "twenty billion, five hundred sixteen million, four hundred seventy-seven thousand, sixty-three".