18427373 has 2 divisors, whose sum is σ = 18427374. Its totient is φ = 18427372.

The previous prime is 18427363. The next prime is 18427379. The reversal of 18427373 is 37372481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10259209 + 8168164 = 3203^2 + 2858^2 .

It is an emirp because it is prime and its reverse (37372481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18427373 - 2⁶ = 18427309 is a prime.

It is a super-2 number, since 2×18427373² = 679136151362258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18427379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9213686 + 9213687.

It is an arithmetic number, because the mean of its divisors is an integer number (9213687).

Almost surely, 2^18427373 is an apocalyptic number.

It is an amenable number.

18427373 is a deficient number, since it is larger than the sum of its proper divisors (1).

18427373 is an equidigital number, since it uses as much as digits as its factorization.

18427373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28224, while the sum is 35.

The square root of 18427373 is about 4292.7116138870. The cubic root of 18427373 is about 264.1320744486.

The spelling of 18427373 in words is "eighteen million, four hundred twenty-seven thousand, three hundred seventy-three".