18919277258 has 32 divisors (see below), whose sum is σ = 33152385024. Its totient is φ = 7928732592.

The previous prime is 18919277243. The next prime is 18919277263. The reversal of 18919277258 is 85277291981.

It is a junction number, because it is equal to n+sod(n) for n = 18919277197 and 18919277206.

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 15 ways as a sum of consecutive naturals, for example, 768935 + ... + 793157.

It is an arithmetic number, because the mean of its divisors is an integer number (1036012032).

Almost surely, 2^18919277258 is an apocalyptic number.

18919277258 is a deficient number, since it is larger than the sum of its proper divisors (14233107766).

18919277258 is a wasteful number, since it uses less digits than its factorization.

18919277258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25466.

The product of its digits is 5080320, while the sum is 59.

The spelling of 18919277258 in words is "eighteen billion, nine hundred nineteen million, two hundred seventy-seven thousand, two hundred fifty-eight".