18820419064 has 8 divisors (see below), whose sum is σ = 35288285760. Its totient is φ = 9410209528.

The previous prime is 18820419061. The next prime is 18820419067. The reversal of 18820419064 is 46091402881.

It is an interprime number because it is at equal distance from previous prime (18820419061) and next prime (18820419067).

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 18820419064.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18820419061) 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 as a sum of consecutive naturals, namely, 1176276184 + ... + 1176276199.

It is an arithmetic number, because the mean of its divisors is an integer number (4411035720).

Almost surely, 2^18820419064 is an apocalyptic number.

It is an amenable number.

18820419064 is a deficient number, since it is larger than the sum of its proper divisors (16467866696).

18820419064 is a wasteful number, since it uses less digits than its factorization.

18820419064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2352552389 (or 2352552385 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 43.

The spelling of 18820419064 in words is "eighteen billion, eight hundred twenty million, four hundred nineteen thousand, sixty-four".