1818381910201 has 8 divisors (see below), whose sum is σ = 1830223632384. Its totient is φ = 1806577136640.

The previous prime is 1818381910183. The next prime is 1818381910207. The reversal of 1818381910201 is 1020191838181.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1818381910201 - 2¹¹ = 1818381908153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1818381910207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9138405 + ... + 9335266.

It is an arithmetic number, because the mean of its divisors is an integer number (228777954048).

Almost surely, 2^{1818381910201} is an apocalyptic number.

It is an amenable number.

1818381910201 is a deficient number, since it is larger than the sum of its proper divisors (11841722183).

1818381910201 is a wasteful number, since it uses less digits than its factorization.

1818381910201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18474311.

The product of its (nonzero) digits is 27648, while the sum is 43.

The spelling of 1818381910201 in words is "one trillion, eight hundred eighteen billion, three hundred eighty-one million, nine hundred ten thousand, two hundred one".