18270013 has 2 divisors, whose sum is σ = 18270014. Its totient is φ = 18270012.

The previous prime is 18269957. The next prime is 18270023. The reversal of 18270013 is 31007281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13935289 + 4334724 = 3733^2 + 2082^2 .

It is a cyclic number.

It is not a de Polignac number, because 18270013 - 2¹⁷ = 18138941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18270023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9135006 + 9135007.

It is an arithmetic number, because the mean of its divisors is an integer number (9135007).

Almost surely, 2^18270013 is an apocalyptic number.

It is an amenable number.

18270013 is a deficient number, since it is larger than the sum of its proper divisors (1).

18270013 is an equidigital number, since it uses as much as digits as its factorization.

18270013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 18270013 is about 4274.3435753341. The cubic root of 18270013 is about 263.3780747920.

Adding to 18270013 its reverse (31007281), we get a palindrome (49277294).

The spelling of 18270013 in words is "eighteen million, two hundred seventy thousand, thirteen".