18803574784405 has 8 divisors (see below), whose sum is σ = 22688954326584. Its totient is φ = 14959750104000.

The previous prime is 18803574784391. The next prime is 18803574784429. The reversal of 18803574784405 is 50448747530881.

It can be written as a sum of positive squares in 4 ways, for example, as 844676797969 + 17958897986436 = 919063^2 + 4237794^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18803574784405 - 2⁵ = 18803574784373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 10388714446 + ... + 10388716255.

It is an arithmetic number, because the mean of its divisors is an integer number (2836119290823).

Almost surely, 2^{18803574784405} is an apocalyptic number.

It is an amenable number.

18803574784405 is a deficient number, since it is larger than the sum of its proper divisors (3885379542179).

18803574784405 is a wasteful number, since it uses less digits than its factorization.

18803574784405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20777430887.

The product of its (nonzero) digits is 120422400, while the sum is 64.

The spelling of 18803574784405 in words is "eighteen trillion, eight hundred three billion, five hundred seventy-four million, seven hundred eighty-four thousand, four hundred five".