18873145072 has 20 divisors (see below), whose sum is σ = 36626979136. Its totient is φ = 9421021440.

The previous prime is 18873145069. The next prime is 18873145073. The reversal of 18873145072 is 27054137881.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18873145073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 961929 + ... + 981352.

Almost surely, 2^18873145072 is an apocalyptic number.

It is an amenable number.

18873145072 is a deficient number, since it is larger than the sum of its proper divisors (17753834064).

18873145072 is a wasteful number, since it uses less digits than its factorization.

18873145072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1943896 (or 1943890 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 46.

The spelling of 18873145072 in words is "eighteen billion, eight hundred seventy-three million, one hundred forty-five thousand, seventy-two".