18419519 has 2 divisors, whose sum is σ = 18419520. Its totient is φ = 18419518.

The previous prime is 18419507. The next prime is 18419543. The reversal of 18419519 is 91591481.

It is a weak prime.

It is an emirp because it is prime and its reverse (91591481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18419519 - 2⁴ = 18419503 is a prime.

It is a super-2 number, since 2×18419519² = 678557360382722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18419119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9209759 + 9209760.

It is an arithmetic number, because the mean of its divisors is an integer number (9209760).

Almost surely, 2^18419519 is an apocalyptic number.

18419519 is a deficient number, since it is larger than the sum of its proper divisors (1).

18419519 is an equidigital number, since it uses as much as digits as its factorization.

18419519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 38.

The square root of 18419519 is about 4291.7967100039. The cubic root of 18419519 is about 264.0945435409.

The spelling of 18419519 in words is "eighteen million, four hundred nineteen thousand, five hundred nineteen".