18538114215 has 16 divisors (see below), whose sum is σ = 29707271136. Its totient is φ = 9871564800.

The previous prime is 18538114187. The next prime is 18538114223. The reversal of 18538114215 is 51241183581.

It is not a de Polignac number, because 18538114215 - 2⁵ = 18538114183 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 954406 + ... + 973635.

It is an arithmetic number, because the mean of its divisors is an integer number (1856704446).

Almost surely, 2^18538114215 is an apocalyptic number.

18538114215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18538114215 is a deficient number, since it is larger than the sum of its proper divisors (11169156921).

18538114215 is a wasteful number, since it uses less digits than its factorization.

18538114215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1928690.

The product of its digits is 38400, while the sum is 39.

Adding to 18538114215 its reverse (51241183581), we get a palindrome (69779297796).

The spelling of 18538114215 in words is "eighteen billion, five hundred thirty-eight million, one hundred fourteen thousand, two hundred fifteen".