18620340019 has 2 divisors, whose sum is σ = 18620340020. Its totient is φ = 18620340018.

The previous prime is 18620340001. The next prime is 18620340047. The reversal of 18620340019 is 91004302681.

It is a weak prime.

It is an emirp because it is prime and its reverse (91004302681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18620340019 - 2²³ = 18611951411 is a prime.

It is a super-2 number, since 2×18620340019² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18620340049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9310170009 + 9310170010.

It is an arithmetic number, because the mean of its divisors is an integer number (9310170010).

Almost surely, 2^18620340019 is an apocalyptic number.

18620340019 is a deficient number, since it is larger than the sum of its proper divisors (1).

18620340019 is an equidigital number, since it uses as much as digits as its factorization.

18620340019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 34.

The spelling of 18620340019 in words is "eighteen billion, six hundred twenty million, three hundred forty thousand, nineteen".