18381910019201 has 32 divisors (see below), whose sum is σ = 20021265089280. Its totient is φ = 16818375168000.

The previous prime is 18381910019159. The next prime is 18381910019227. The reversal of 18381910019201 is 10291001918381.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18381910019201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18381910015201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 499042481 + ... + 499079313.

It is an arithmetic number, because the mean of its divisors is an integer number (625664534040).

Almost surely, 2^{18381910019201} is an apocalyptic number.

It is an amenable number.

18381910019201 is a deficient number, since it is larger than the sum of its proper divisors (1639355070079).

18381910019201 is a wasteful number, since it uses less digits than its factorization.

18381910019201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43337.

The product of its (nonzero) digits is 31104, while the sum is 44.

The spelling of 18381910019201 in words is "eighteen trillion, three hundred eighty-one billion, nine hundred ten million, nineteen thousand, two hundred one".