18507544141 has 4 divisors (see below), whose sum is σ = 18509280832. Its totient is φ = 18505807452.

The previous prime is 18507544109. The next prime is 18507544163. The reversal of 18507544141 is 14144570581.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 14144570581 = 6029 ⋅2346089.

It is a cyclic number.

It is not a de Polignac number, because 18507544141 - 2⁵ = 18507544109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18507544094 and 18507544103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18507544541) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 852261 + ... + 873706.

It is an arithmetic number, because the mean of its divisors is an integer number (4627320208).

Almost surely, 2^18507544141 is an apocalyptic number.

It is an amenable number.

18507544141 is a deficient number, since it is larger than the sum of its proper divisors (1736691).

18507544141 is a wasteful number, since it uses less digits than its factorization.

18507544141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1736690.

The product of its (nonzero) digits is 89600, while the sum is 40.

The spelling of 18507544141 in words is "eighteen billion, five hundred seven million, five hundred forty-four thousand, one hundred forty-one".