20188849463 has 4 divisors (see below), whose sum is σ = 20243860320. Its totient is φ = 20133838608.

The previous prime is 20188849459. The next prime is 20188849481. The reversal of 20188849463 is 36494888102.

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 20188849463 - 2² = 20188849459 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 (20188849433) 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 in 3 ways as a sum of consecutive naturals, for example, 27504878 + ... + 27505611.

It is an arithmetic number, because the mean of its divisors is an integer number (5060965080).

Almost surely, 2^20188849463 is an apocalyptic number.

20188849463 is a deficient number, since it is larger than the sum of its proper divisors (55010857).

20188849463 is an equidigital number, since it uses as much as digits as its factorization.

20188849463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55010856.

The product of its (nonzero) digits is 2654208, while the sum is 53.

The spelling of 20188849463 in words is "twenty billion, one hundred eighty-eight million, eight hundred forty-nine thousand, four hundred sixty-three".