18026784393 has 16 divisors (see below), whose sum is σ = 24693293760. Its totient is φ = 11689275456.

The previous prime is 18026784383. The next prime is 18026784401. The reversal of 18026784393 is 39348762081.

It is not a de Polignac number, because 18026784393 - 2²⁶ = 17959675529 is a prime.

It is a super-3 number, since 3×18026784393³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (18026784353) by changing a digit.

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, 342523 + ... + 391631.

It is an arithmetic number, because the mean of its divisors is an integer number (1543330860).

Almost surely, 2^18026784393 is an apocalyptic number.

It is an amenable number.

18026784393 is a deficient number, since it is larger than the sum of its proper divisors (6666509367).

18026784393 is a wasteful number, since it uses less digits than its factorization.

18026784393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52456.

The product of its (nonzero) digits is 1741824, while the sum is 51.

The spelling of 18026784393 in words is "eighteen billion, twenty-six million, seven hundred eighty-four thousand, three hundred ninety-three".