2018381818202 has 4 divisors (see below), whose sum is σ = 3027572727306. Its totient is φ = 1009190909100.

The previous prime is 2018381818169. The next prime is 2018381818217. The reversal of 2018381818202 is 2028181838102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1643065076041 + 375316742161 = 1281821^2 + 612631^2 .

It is a super-2 number, since 2×2018381818202² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 504595454549 + ... + 504595454552.

Almost surely, 2^{2018381818202} is an apocalyptic number.

2018381818202 is a deficient number, since it is larger than the sum of its proper divisors (1009190909104).

2018381818202 is a wasteful number, since it uses less digits than its factorization.

2018381818202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009190909103.

The product of its (nonzero) digits is 98304, while the sum is 44.

The spelling of 2018381818202 in words is "two trillion, eighteen billion, three hundred eighty-one million, eight hundred eighteen thousand, two hundred two".