18308098078 has 4 divisors (see below), whose sum is σ = 27462147120. Its totient is φ = 9154049038.

The previous prime is 18308098051. The next prime is 18308098091. The reversal of 18308098078 is 87089080381.

It is a semiprime because it is the product of two primes.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 4577024518 + ... + 4577024521.

It is an arithmetic number, because the mean of its divisors is an integer number (6865536780).

Almost surely, 2^18308098078 is an apocalyptic number.

18308098078 is a deficient number, since it is larger than the sum of its proper divisors (9154049042).

18308098078 is an equidigital number, since it uses as much as digits as its factorization.

18308098078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9154049041.

The product of its (nonzero) digits is 774144, while the sum is 52.

It can be divided in two parts, 1830 and 8098078, that added together give a palindrome (8099908).

The spelling of 18308098078 in words is "eighteen billion, three hundred eight million, ninety-eight thousand, seventy-eight".