18603361851 has 36 divisors (see below), whose sum is σ = 26738085816. Its totient is φ = 11465511680.

The previous prime is 18603361807. The next prime is 18603361859. The reversal of 18603361851 is 15816330681.

It is not a de Polignac number, because 18603361851 - 2¹⁰ = 18603360827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18603361859) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 69157345 + ... + 69157613.

It is an arithmetic number, because the mean of its divisors is an integer number (742724606).

Almost surely, 2^18603361851 is an apocalyptic number.

18603361851 is a deficient number, since it is larger than the sum of its proper divisors (8134723965).

18603361851 is an frugal number, since it uses more digits than its factorization.

18603361851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700 (or 360 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 42.

The spelling of 18603361851 in words is "eighteen billion, six hundred three million, three hundred sixty-one thousand, eight hundred fifty-one".