1820181818202 has 32 divisors (see below), whose sum is σ = 3971381261760. Its totient is φ = 551559765120.

The previous prime is 1820181818179. The next prime is 1820181818251. The reversal of 1820181818202 is 2028181810281.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3683574 + ... + 4148382.

It is an arithmetic number, because the mean of its divisors is an integer number (124105664430).

Almost surely, 2^{1820181818202} is an apocalyptic number.

1820181818202 is an abundant number, since it is smaller than the sum of its proper divisors (2151199443558).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1820181818202 is a wasteful number, since it uses less digits than its factorization.

1820181818202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524158.

The product of its (nonzero) digits is 32768, while the sum is 42.

The spelling of 1820181818202 in words is "one trillion, eight hundred twenty billion, one hundred eighty-one million, eight hundred eighteen thousand, two hundred two".