18010913 has 2 divisors, whose sum is σ = 18010914. Its totient is φ = 18010912.

The previous prime is 18010903. The next prime is 18010919. The reversal of 18010913 is 31901081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10349089 + 7661824 = 3217^2 + 2768^2 .

It is a cyclic number.

It is not a de Polignac number, because 18010913 - 2¹⁰ = 18009889 is a prime.

It is not a weakly prime, because it can be changed into another prime (18010919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9005456 + 9005457.

It is an arithmetic number, because the mean of its divisors is an integer number (9005457).

Almost surely, 2^18010913 is an apocalyptic number.

It is an amenable number.

18010913 is a deficient number, since it is larger than the sum of its proper divisors (1).

18010913 is an equidigital number, since it uses as much as digits as its factorization.

18010913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 18010913 is about 4243.9266016273. The cubic root of 18010913 is about 262.1270919633.

Adding to 18010913 its reverse (31901081), we get a palindrome (49911994).

The spelling of 18010913 in words is "eighteen million, ten thousand, nine hundred thirteen".