18705152039 has 4 divisors (see below), whose sum is σ = 21377316624. Its totient is φ = 16032987456.

The previous prime is 18705152027. The next prime is 18705152107. The reversal of 18705152039 is 93025150781.

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 18705152039 - 2⁴ = 18705152023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18705151987 and 18705152005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18705152839) 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, 1336082282 + ... + 1336082295.

It is an arithmetic number, because the mean of its divisors is an integer number (5344329156).

Almost surely, 2^18705152039 is an apocalyptic number.

18705152039 is a deficient number, since it is larger than the sum of its proper divisors (2672164585).

18705152039 is an equidigital number, since it uses as much as digits as its factorization.

18705152039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2672164584.

The product of its (nonzero) digits is 75600, while the sum is 41.

The spelling of 18705152039 in words is "eighteen billion, seven hundred five million, one hundred fifty-two thousand, thirty-nine".