18918619012 has 24 divisors (see below), whose sum is σ = 34703821152. Its totient is φ = 9013972800.

The previous prime is 18918618989. The next prime is 18918619021. The reversal of 18918619012 is 21091681981.

It is a super-2 number, since 2×18918619012² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1334314 + ... + 1348417.

It is an arithmetic number, because the mean of its divisors is an integer number (1445992548).

Almost surely, 2^18918619012 is an apocalyptic number.

It is an amenable number.

18918619012 is a deficient number, since it is larger than the sum of its proper divisors (15785202140).

18918619012 is a wasteful number, since it uses less digits than its factorization.

18918619012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2682819 (or 2682817 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 46.

The spelling of 18918619012 in words is "eighteen billion, nine hundred eighteen million, six hundred nineteen thousand, twelve".