18780019573 has 16 divisors (see below), whose sum is σ = 22166323200. Its totient is φ = 15570097200.

The previous prime is 18780019469. The next prime is 18780019579. The reversal of 18780019573 is 37591008781.

It is not a de Polignac number, because 18780019573 - 2¹³ = 18780011381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18780019579) 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 15 ways as a sum of consecutive naturals, for example, 434868 + ... + 476098.

It is an arithmetic number, because the mean of its divisors is an integer number (1385395200).

Almost surely, 2^18780019573 is an apocalyptic number.

It is an amenable number.

18780019573 is a deficient number, since it is larger than the sum of its proper divisors (3386303627).

18780019573 is a wasteful number, since it uses less digits than its factorization.

18780019573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43368.

The product of its (nonzero) digits is 423360, while the sum is 49.

The spelling of 18780019573 in words is "eighteen billion, seven hundred eighty million, nineteen thousand, five hundred seventy-three".