18585501019 has 2 divisors, whose sum is σ = 18585501020. Its totient is φ = 18585501018.

The previous prime is 18585501001. The next prime is 18585501029. The reversal of 18585501019 is 91010558581.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18585501019 - 2⁵ = 18585500987 is a prime.

It is a super-2 number, since 2×18585501019² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18585501029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9292750509 + 9292750510.

It is an arithmetic number, because the mean of its divisors is an integer number (9292750510).

Almost surely, 2^18585501019 is an apocalyptic number.

18585501019 is a deficient number, since it is larger than the sum of its proper divisors (1).

18585501019 is an equidigital number, since it uses as much as digits as its factorization.

18585501019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72000, while the sum is 43.

The spelling of 18585501019 in words is "eighteen billion, five hundred eighty-five million, five hundred one thousand, nineteen".