18243549098 has 16 divisors (see below), whose sum is σ = 27510118944. Its totient is φ = 9073557360.

The previous prime is 18243549091. The next prime is 18243549179. The reversal of 18243549098 is 89094534281.

It is a super-2 number, since 2×18243549098² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (18243549091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 827636 + ... + 849392.

It is an arithmetic number, because the mean of its divisors is an integer number (1719382434).

Almost surely, 2^18243549098 is an apocalyptic number.

18243549098 is a deficient number, since it is larger than the sum of its proper divisors (9266569846).

18243549098 is a wasteful number, since it uses less digits than its factorization.

18243549098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23957.

The product of its (nonzero) digits is 2488320, while the sum is 53.

The spelling of 18243549098 in words is "eighteen billion, two hundred forty-three million, five hundred forty-nine thousand, ninety-eight".