18712069238 has 16 divisors (see below), whose sum is σ = 28323059856. Its totient is φ = 9271415520.

The previous prime is 18712069223. The next prime is 18712069249. The reversal of 18712069238 is 83296021781.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18712069192 and 18712069201.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 11120 + ... + 193772.

It is an arithmetic number, because the mean of its divisors is an integer number (1770191241).

Almost surely, 2^18712069238 is an apocalyptic number.

18712069238 is a deficient number, since it is larger than the sum of its proper divisors (9610990618).

18712069238 is a wasteful number, since it uses less digits than its factorization.

18712069238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183119.

The product of its (nonzero) digits is 290304, while the sum is 47.

The spelling of 18712069238 in words is "eighteen billion, seven hundred twelve million, sixty-nine thousand, two hundred thirty-eight".