18240123098 has 32 divisors (see below), whose sum is σ = 29011167360. Its totient is φ = 8587458880.

The previous prime is 18240123061. The next prime is 18240123133. The reversal of 18240123098 is 89032104281.

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 in 15 ways as a sum of consecutive naturals, for example, 495593 + ... + 531123.

It is an arithmetic number, because the mean of its divisors is an integer number (906598980).

Almost surely, 2^18240123098 is an apocalyptic number.

18240123098 is a deficient number, since it is larger than the sum of its proper divisors (10771044262).

18240123098 is a wasteful number, since it uses less digits than its factorization.

18240123098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35782.

The product of its (nonzero) digits is 27648, while the sum is 38.

Adding to 18240123098 its sum of digits (38), we get a square (18240123136 = 135056²).

The spelling of 18240123098 in words is "eighteen billion, two hundred forty million, one hundred twenty-three thousand, ninety-eight".