18736019 has 2 divisors, whose sum is σ = 18736020. Its totient is φ = 18736018.

The previous prime is 18735979. The next prime is 18736031. The reversal of 18736019 is 91063781.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18736019 is a prime.

It is a super-2 number, since 2×18736019² = 702076815936722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18736019.

It is not a weakly prime, because it can be changed into another prime (18736219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9368009 + 9368010.

It is an arithmetic number, because the mean of its divisors is an integer number (9368010).

Almost surely, 2^18736019 is an apocalyptic number.

18736019 is a deficient number, since it is larger than the sum of its proper divisors (1).

18736019 is an equidigital number, since it uses as much as digits as its factorization.

18736019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 18736019 is about 4328.5123310440. The cubic root of 18736019 is about 265.5985946347.

The spelling of 18736019 in words is "eighteen million, seven hundred thirty-six thousand, nineteen".