18476413 has 2 divisors, whose sum is σ = 18476414. Its totient is φ = 18476412.

The previous prime is 18476411. The next prime is 18476443. The reversal of 18476413 is 31467481.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15225604 + 3250809 = 3902^2 + 1803^2 .

It is an emirp because it is prime and its reverse (31467481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18476413 - 2¹ = 18476411 is a prime.

Together with 18476411, it forms a pair of twin primes.

It is equal to p_1179763 and since 18476413 and 1179763 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18476411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9238206 + 9238207.

It is an arithmetic number, because the mean of its divisors is an integer number (9238207).

Almost surely, 2^18476413 is an apocalyptic number.

It is an amenable number.

18476413 is a deficient number, since it is larger than the sum of its proper divisors (1).

18476413 is an equidigital number, since it uses as much as digits as its factorization.

18476413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 34.

The square root of 18476413 is about 4298.4198259360. The cubic root of 18476413 is about 264.3661747991.

It can be divided in two parts, 1847 and 6413, that multiplied together give a palindrome (11844811).

The spelling of 18476413 in words is "eighteen million, four hundred seventy-six thousand, four hundred thirteen".