18820572209313 has 128 divisors (see below), whose sum is σ = 31255947878400. Its totient is φ = 9836989747200.

The previous prime is 18820572209293. The next prime is 18820572209321. The reversal of 18820572209313 is 31390227502881.

It is not a de Polignac number, because 18820572209313 - 2²⁸ = 18820303773857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18820572209333) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 819664153 + ... + 819687113.

It is an arithmetic number, because the mean of its divisors is an integer number (244187092800).

Almost surely, 2^{18820572209313} is an apocalyptic number.

It is an amenable number.

18820572209313 is a deficient number, since it is larger than the sum of its proper divisors (12435375669087).

18820572209313 is a wasteful number, since it uses less digits than its factorization.

18820572209313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23583.

The product of its (nonzero) digits is 1451520, while the sum is 51.

The spelling of 18820572209313 in words is "eighteen trillion, eight hundred twenty billion, five hundred seventy-two million, two hundred nine thousand, three hundred thirteen".