18816812312 has 8 divisors (see below), whose sum is σ = 35281523100. Its totient is φ = 9408406152.

The previous prime is 18816812297. The next prime is 18816812347. The reversal of 18816812312 is 21321861881.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 18816812312.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1176050762 + ... + 1176050777.

Almost surely, 2^18816812312 is an apocalyptic number.

It is an amenable number.

18816812312 is a deficient number, since it is larger than the sum of its proper divisors (16464710788).

18816812312 is a wasteful number, since it uses less digits than its factorization.

18816812312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2352101545 (or 2352101541 counting only the distinct ones).

The product of its digits is 36864, while the sum is 41.

The spelling of 18816812312 in words is "eighteen billion, eight hundred sixteen million, eight hundred twelve thousand, three hundred twelve".