18150013823 has 4 divisors (see below), whose sum is σ = 18492466968. Its totient is φ = 17807560680.

The previous prime is 18150013813. The next prime is 18150013837. The reversal of 18150013823 is 32831005181.

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 18150013823 - 2¹⁶ = 18149948287 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18150013823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18150013813) 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, 171226493 + ... + 171226598.

It is an arithmetic number, because the mean of its divisors is an integer number (4623116742).

Almost surely, 2^18150013823 is an apocalyptic number.

18150013823 is a deficient number, since it is larger than the sum of its proper divisors (342453145).

18150013823 is an equidigital number, since it uses as much as digits as its factorization.

18150013823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342453144.

The product of its (nonzero) digits is 5760, while the sum is 32.

The spelling of 18150013823 in words is "eighteen billion, one hundred fifty million, thirteen thousand, eight hundred twenty-three".