18868505372 has 6 divisors (see below), whose sum is σ = 33019884408. Its totient is φ = 9434252684.

The previous prime is 18868505323. The next prime is 18868505437. The reversal of 18868505372 is 27350586881.

It is a super-3 number, since 3×18868505372³ (a number of 32 digits) contains 333 as substring.

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, 2358563168 + ... + 2358563175.

It is an arithmetic number, because the mean of its divisors is an integer number (5503314068).

Almost surely, 2^18868505372 is an apocalyptic number.

It is an amenable number.

18868505372 is a deficient number, since it is larger than the sum of its proper divisors (14151379036).

18868505372 is a wasteful number, since it uses less digits than its factorization.

18868505372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4717126347 (or 4717126345 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 53.

The spelling of 18868505372 in words is "eighteen billion, eight hundred sixty-eight million, five hundred five thousand, three hundred seventy-two".