18028926919 has 4 divisors (see below), whose sum is σ = 18324483160. Its totient is φ = 17733370680.

The previous prime is 18028926913. The next prime is 18028926941. The reversal of 18028926919 is 91962982081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91962982081 = 907 ⋅101392483.

It is a cyclic number.

It is not a de Polignac number, because 18028926919 - 2¹¹ = 18028924871 is a prime.

It is a super-2 number, since 2×18028926919² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18028926919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18028926913) 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 3 ways as a sum of consecutive naturals, for example, 147778029 + ... + 147778150.

It is an arithmetic number, because the mean of its divisors is an integer number (4581120790).

Almost surely, 2^18028926919 is an apocalyptic number.

18028926919 is a deficient number, since it is larger than the sum of its proper divisors (295556241).

18028926919 is an equidigital number, since it uses as much as digits as its factorization.

18028926919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295556240.

The product of its (nonzero) digits is 1119744, while the sum is 55.

The spelling of 18028926919 in words is "eighteen billion, twenty-eight million, nine hundred twenty-six thousand, nine hundred nineteen".