18916643012 has 48 divisors (see below), whose sum is σ = 33926692800. Its totient is φ = 9226120320.

The previous prime is 18916643003. The next prime is 18916643047. The reversal of 18916643012 is 21034661981.

It is a super-3 number, since 3×18916643012³ (a number of 32 digits) contains 333 as substring.

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 in 15 ways as a sum of consecutive naturals, for example, 30858818 + ... + 30859430.

It is an arithmetic number, because the mean of its divisors is an integer number (706806100).

Almost surely, 2^18916643012 is an apocalyptic number.

It is an amenable number.

18916643012 is a deficient number, since it is larger than the sum of its proper divisors (15010049788).

18916643012 is a wasteful number, since it uses less digits than its factorization.

18916643012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1476 (or 1474 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 41.

The spelling of 18916643012 in words is "eighteen billion, nine hundred sixteen million, six hundred forty-three thousand, twelve".