18513814712 has 8 divisors (see below), whose sum is σ = 34713402600. Its totient is φ = 9256907352.

The previous prime is 18513814703. The next prime is 18513814721. The reversal of 18513814712 is 21741831581.

It is an interprime number because it is at equal distance from previous prime (18513814703) and next prime (18513814721).

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

It is a super-2 number, since 2×18513814712² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18513814712.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1157113412 + ... + 1157113427.

It is an arithmetic number, because the mean of its divisors is an integer number (4339175325).

Almost surely, 2^18513814712 is an apocalyptic number.

It is an amenable number.

18513814712 is a deficient number, since it is larger than the sum of its proper divisors (16199587888).

18513814712 is a wasteful number, since it uses less digits than its factorization.

18513814712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2314226845 (or 2314226841 counting only the distinct ones).

The product of its digits is 53760, while the sum is 41.

The spelling of 18513814712 in words is "eighteen billion, five hundred thirteen million, eight hundred fourteen thousand, seven hundred twelve".