18500187019 has 2 divisors, whose sum is σ = 18500187020. Its totient is φ = 18500187018.

The previous prime is 18500186989. The next prime is 18500187053. The reversal of 18500187019 is 91078100581.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18500187019 - 2¹¹ = 18500184971 is a prime.

It is a super-2 number, since 2×18500187019² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18500187059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9250093509 + 9250093510.

It is an arithmetic number, because the mean of its divisors is an integer number (9250093510).

Almost surely, 2^18500187019 is an apocalyptic number.

18500187019 is a deficient number, since it is larger than the sum of its proper divisors (1).

18500187019 is an equidigital number, since it uses as much as digits as its factorization.

18500187019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 40.

The spelling of 18500187019 in words is "eighteen billion, five hundred million, one hundred eighty-seven thousand, nineteen".