1818201100090 has 64 divisors (see below), whose sum is σ = 3412816727040. Its totient is φ = 696640320000.

The previous prime is 1818201100069. The next prime is 1818201100099. The reversal of 1818201100090 is 900011028181.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (1818201100099) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 138039205 + ... + 138052375.

It is an arithmetic number, because the mean of its divisors is an integer number (53325261360).

Almost surely, 2^{1818201100090} is an apocalyptic number.

1818201100090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1818201100090 is a deficient number, since it is larger than the sum of its proper divisors (1594615626950).

1818201100090 is a wasteful number, since it uses less digits than its factorization.

1818201100090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17719.

The product of its (nonzero) digits is 1152, while the sum is 31.

The spelling of 1818201100090 in words is "one trillion, eight hundred eighteen billion, two hundred one million, one hundred thousand, ninety".