18039641823 has 24 divisors (see below), whose sum is σ = 29859603488. Its totient is φ = 10280716992.

The previous prime is 18039641803. The next prime is 18039641839. The reversal of 18039641823 is 32814693081.

18039641823 is a `hidden beast` number, since 1 + 80 + 396 + 4 + 182 + 3 = 666.

It is not a de Polignac number, because 18039641823 - 2⁵ = 18039641791 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 (18039641803) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 360340 + ... + 407337.

Almost surely, 2^18039641823 is an apocalyptic number.

18039641823 is a deficient number, since it is larger than the sum of its proper divisors (11819961665).

18039641823 is a wasteful number, since it uses less digits than its factorization.

18039641823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768063 (or 768060 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The spelling of 18039641823 in words is "eighteen billion, thirty-nine million, six hundred forty-one thousand, eight hundred twenty-three".