1800418913 has 2 divisors, whose sum is σ = 1800418914. Its totient is φ = 1800418912.

The previous prime is 1800418889. The next prime is 1800418933. The reversal of 1800418913 is 3198140081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1297224289 + 503194624 = 36017^2 + 22432^2 .

It is a cyclic number.

It is not a de Polignac number, because 1800418913 - 2¹⁰ = 1800417889 is a prime.

It is not a weakly prime, because it can be changed into another prime (1800418933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 900209456 + 900209457.

It is an arithmetic number, because the mean of its divisors is an integer number (900209457).

Almost surely, 2^1800418913 is an apocalyptic number.

It is an amenable number.

1800418913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1800418913 is an equidigital number, since it uses as much as digits as its factorization.

1800418913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 1800418913 is about 42431.3435210341. The cubic root of 1800418913 is about 1216.5347589610.

Adding to 1800418913 its reverse (3198140081), we get a palindrome (4998558994).

The spelling of 1800418913 in words is "one billion, eight hundred million, four hundred eighteen thousand, nine hundred thirteen".