18182023189 has 4 divisors (see below), whose sum is σ = 19834934400. Its totient is φ = 16529111980.

The previous prime is 18182023163. The next prime is 18182023201. The reversal of 18182023189 is 98132028181.

It is a happy number.

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: 98132028181 = 11 ⋅8921093471.

It is a cyclic number.

It is not a de Polignac number, because 18182023189 - 2⁷ = 18182023061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18182023289) 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, 826455589 + ... + 826455610.

It is an arithmetic number, because the mean of its divisors is an integer number (4958733600).

Almost surely, 2^18182023189 is an apocalyptic number.

It is an amenable number.

18182023189 is a deficient number, since it is larger than the sum of its proper divisors (1652911211).

18182023189 is a wasteful number, since it uses less digits than its factorization.

18182023189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652911210.

The product of its (nonzero) digits is 55296, while the sum is 43.

The spelling of 18182023189 in words is "eighteen billion, one hundred eighty-two million, twenty-three thousand, one hundred eighty-nine".