18938841752 has 8 divisors (see below), whose sum is σ = 35510328300. Its totient is φ = 9469420872.

The previous prime is 18938841751. The next prime is 18938841787. The reversal of 18938841752 is 25714883981.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18938841751) by changing a digit.

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 as a sum of consecutive naturals, namely, 1183677602 + ... + 1183677617.

Almost surely, 2^18938841752 is an apocalyptic number.

It is an amenable number.

18938841752 is a deficient number, since it is larger than the sum of its proper divisors (16571486548).

18938841752 is a wasteful number, since it uses less digits than its factorization.

18938841752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2367355225 (or 2367355221 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 56.

The spelling of 18938841752 in words is "eighteen billion, nine hundred thirty-eight million, eight hundred forty-one thousand, seven hundred fifty-two".