18419371 has 2 divisors, whose sum is σ = 18419372. Its totient is φ = 18419370.

The previous prime is 18419369. The next prime is 18419383. The reversal of 18419371 is 17391481.

It is a weak prime.

It is an emirp because it is prime and its reverse (17391481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18419371 - 2¹ = 18419369 is a prime.

Together with 18419369, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (18419311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9209685 + 9209686.

It is an arithmetic number, because the mean of its divisors is an integer number (9209686).

Almost surely, 2^18419371 is an apocalyptic number.

18419371 is a deficient number, since it is larger than the sum of its proper divisors (1).

18419371 is an equidigital number, since it uses as much as digits as its factorization.

18419371 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 34.

The square root of 18419371 is about 4291.7794677732. The cubic root of 18419371 is about 264.0938362098.

The spelling of 18419371 in words is "eighteen million, four hundred nineteen thousand, three hundred seventy-one".