1814901813 has 6 divisors (see below), whose sum is σ = 2621524854. Its totient is φ = 1209934536.

The previous prime is 1814901811. The next prime is 1814901857. The reversal of 1814901813 is 3181094181.

It can be written as a sum of positive squares in only one way, i.e., 1711228689 + 103673124 = 41367^2 + 10182^2 .

It is not a de Polignac number, because 1814901813 - 2¹ = 1814901811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1814901811) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 100827870 + ... + 100827887.

It is an arithmetic number, because the mean of its divisors is an integer number (436920809).

Almost surely, 2^1814901813 is an apocalyptic number.

It is an amenable number.

1814901813 is a deficient number, since it is larger than the sum of its proper divisors (806623041).

1814901813 is a wasteful number, since it uses less digits than its factorization.

1814901813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201655763 (or 201655760 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 36.

The square root of 1814901813 is about 42601.6644393150. The cubic root of 1814901813 is about 1219.7880606935.

Adding to 1814901813 its reverse (3181094181), we get a palindrome (4995995994).

The spelling of 1814901813 in words is "one billion, eight hundred fourteen million, nine hundred one thousand, eight hundred thirteen".