18162635143 has 4 divisors (see below), whose sum is σ = 18219930840. Its totient is φ = 18105339448.

The previous prime is 18162635131. The next prime is 18162635159. The reversal of 18162635143 is 34153626181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34153626181 = 227 ⋅150456503.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18162635143 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18162635096 and 18162635105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18162632143) 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, 28647373 + ... + 28648006.

It is an arithmetic number, because the mean of its divisors is an integer number (4554982710).

Almost surely, 2^18162635143 is an apocalyptic number.

18162635143 is a deficient number, since it is larger than the sum of its proper divisors (57295697).

18162635143 is an equidigital number, since it uses as much as digits as its factorization.

18162635143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57295696.

The product of its digits is 103680, while the sum is 40.

The spelling of 18162635143 in words is "eighteen billion, one hundred sixty-two million, six hundred thirty-five thousand, one hundred forty-three".