18449545130123 has 4 divisors (see below), whose sum is σ = 18450786117960. Its totient is φ = 18448304142288.

The previous prime is 18449545130117. The next prime is 18449545130143. The reversal of 18449545130123 is 32103154594481.

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

It is a cyclic number.

It is not a de Polignac number, because 18449545130123 - 2⁶ = 18449545130059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18449545130113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 620471618 + ... + 620501351.

It is an arithmetic number, because the mean of its divisors is an integer number (4612696529490).

Almost surely, 2^{18449545130123} is an apocalyptic number.

18449545130123 is a deficient number, since it is larger than the sum of its proper divisors (1240987837).

18449545130123 is a wasteful number, since it uses less digits than its factorization.

18449545130123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240987836.

The product of its (nonzero) digits is 2073600, while the sum is 50.

The spelling of 18449545130123 in words is "eighteen trillion, four hundred forty-nine billion, five hundred forty-five million, one hundred thirty thousand, one hundred twenty-three".