18349515706 has 4 divisors (see below), whose sum is σ = 27524273562. Its totient is φ = 9174757852.

The previous prime is 18349515659. The next prime is 18349515739. The reversal of 18349515706 is 60751594381.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 18148131225 + 201384481 = 134715^2 + 14191^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18349515706.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 4587378925 + ... + 4587378928.

Almost surely, 2^18349515706 is an apocalyptic number.

18349515706 is a deficient number, since it is larger than the sum of its proper divisors (9174757856).

18349515706 is an equidigital number, since it uses as much as digits as its factorization.

18349515706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9174757855.

The product of its (nonzero) digits is 907200, while the sum is 49.

The spelling of 18349515706 in words is "eighteen billion, three hundred forty-nine million, five hundred fifteen thousand, seven hundred six".