18259478093 has 2 divisors, whose sum is σ = 18259478094. Its totient is φ = 18259478092.

The previous prime is 18259478089. The next prime is 18259478197. The reversal of 18259478093 is 39087495281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17806767364 + 452710729 = 133442^2 + 21277^2 .

It is a cyclic number.

It is not a de Polignac number, because 18259478093 - 2² = 18259478089 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18259478053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9129739046 + 9129739047.

It is an arithmetic number, because the mean of its divisors is an integer number (9129739047).

Almost surely, 2^18259478093 is an apocalyptic number.

It is an amenable number.

18259478093 is a deficient number, since it is larger than the sum of its proper divisors (1).

18259478093 is an equidigital number, since it uses as much as digits as its factorization.

18259478093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4354560, while the sum is 56.

The spelling of 18259478093 in words is "eighteen billion, two hundred fifty-nine million, four hundred seventy-eight thousand, ninety-three".