18538690183 has 8 divisors (see below), whose sum is σ = 19977977376. Its totient is φ = 17101293600.

The previous prime is 18538690139. The next prime is 18538690187. The reversal of 18538690183 is 38109683581.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18538690183 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 18538690183.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18538690187) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 452248 + ... + 491533.

It is an arithmetic number, because the mean of its divisors is an integer number (2497247172).

Almost surely, 2^18538690183 is an apocalyptic number.

18538690183 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18538690183 is a deficient number, since it is larger than the sum of its proper divisors (1439287193).

18538690183 is a wasteful number, since it uses less digits than its factorization.

18538690183 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 945305.

The product of its (nonzero) digits is 1244160, while the sum is 52.

The spelling of 18538690183 in words is "eighteen billion, five hundred thirty-eight million, six hundred ninety thousand, one hundred eighty-three".