18784770258 has 16 divisors (see below), whose sum is σ = 38045105280. Its totient is φ = 6182329296.

The previous prime is 18784770227. The next prime is 18784770281. The reversal of 18784770258 is 85207748781.

It is a junction number, because it is equal to n+sod(n) for n = 18784770198 and 18784770207.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19814685 + ... + 19815632.

It is an arithmetic number, because the mean of its divisors is an integer number (2377819080).

Almost surely, 2^18784770258 is an apocalyptic number.

18784770258 is an abundant number, since it is smaller than the sum of its proper divisors (19260335022).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18784770258 is a wasteful number, since it uses less digits than its factorization.

18784770258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39630401.

The product of its (nonzero) digits is 7024640, while the sum is 57.

The spelling of 18784770258 in words is "eighteen billion, seven hundred eighty-four million, seven hundred seventy thousand, two hundred fifty-eight".