1818202101 has 16 divisors (see below), whose sum is σ = 2471197248. Its totient is φ = 1188896000.

The previous prime is 1818202081. The next prime is 1818202103. The reversal of 1818202101 is 1012028181.

It is a cyclic number.

It is not a de Polignac number, because 1818202101 - 2⁵ = 1818202069 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1818202103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4381 + ... + 60461.

It is an arithmetic number, because the mean of its divisors is an integer number (154449828).

Almost surely, 2^1818202101 is an apocalyptic number.

It is an amenable number.

1818202101 is a deficient number, since it is larger than the sum of its proper divisors (652995147).

1818202101 is a wasteful number, since it uses less digits than its factorization.

1818202101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56292.

The product of its (nonzero) digits is 256, while the sum is 24.

The square root of 1818202101 is about 42640.3811075839. The cubic root of 1818202101 is about 1220.5269829865.

It can be divided in two parts, 181820 and 2101, that added together give a triangular number (183921 = T₆₀₆).

The spelling of 1818202101 in words is "one billion, eight hundred eighteen million, two hundred two thousand, one hundred one".