18102939115 has 4 divisors (see below), whose sum is σ = 21723526944. Its totient is φ = 14482351288.

The previous prime is 18102939103. The next prime is 18102939119. The reversal of 18102939115 is 51193920181.

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 18102939115 - 2⁹ = 18102938603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18102939119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1810293907 + ... + 1810293916.

It is an arithmetic number, because the mean of its divisors is an integer number (5430881736).

Almost surely, 2^18102939115 is an apocalyptic number.

18102939115 is a deficient number, since it is larger than the sum of its proper divisors (3620587829).

18102939115 is an equidigital number, since it uses as much as digits as its factorization.

18102939115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3620587828.

The product of its (nonzero) digits is 19440, while the sum is 40.

The spelling of 18102939115 in words is "eighteen billion, one hundred two million, nine hundred thirty-nine thousand, one hundred fifteen".