18388951004 has 12 divisors (see below), whose sum is σ = 32186914200. Its totient is φ = 9192689808.

The previous prime is 18388950973. The next prime is 18388951033. The reversal of 18388951004 is 40015988381.

It is a super-3 number, since 3×18388951004³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18388951004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 423119 + ... + 464550.

It is an arithmetic number, because the mean of its divisors is an integer number (2682242850).

Almost surely, 2^18388951004 is an apocalyptic number.

It is an amenable number.

18388951004 is a deficient number, since it is larger than the sum of its proper divisors (13797963196).

18388951004 is a wasteful number, since it uses less digits than its factorization.

18388951004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892852 (or 892850 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 47.

The spelling of 18388951004 in words is "eighteen billion, three hundred eighty-eight million, nine hundred fifty-one thousand, four".