18485413 has 2 divisors, whose sum is σ = 18485414. Its totient is φ = 18485412.

The previous prime is 18485407. The next prime is 18485417. The reversal of 18485413 is 31458481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17791524 + 693889 = 4218^2 + 833^2 .

It is an emirp because it is prime and its reverse (31458481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18485413 - 2⁵ = 18485381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18485417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9242706 + 9242707.

It is an arithmetic number, because the mean of its divisors is an integer number (9242707).

Almost surely, 2^18485413 is an apocalyptic number.

It is an amenable number.

18485413 is a deficient number, since it is larger than the sum of its proper divisors (1).

18485413 is an equidigital number, since it uses as much as digits as its factorization.

18485413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15360, while the sum is 34.

The square root of 18485413 is about 4299.4665948231. The cubic root of 18485413 is about 264.4090927499.

The spelling of 18485413 in words is "eighteen million, four hundred eighty-five thousand, four hundred thirteen".