18992027 has 2 divisors, whose sum is σ = 18992028. Its totient is φ = 18992026.

The previous prime is 18991981. The next prime is 18992033. The reversal of 18992027 is 72029981.

It is a strong prime.

It is an emirp because it is prime and its reverse (72029981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18992027 - 2¹⁸ = 18729883 is a prime.

It is not a weakly prime, because it can be changed into another prime (18992047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9496013 + 9496014.

It is an arithmetic number, because the mean of its divisors is an integer number (9496014).

Almost surely, 2^18992027 is an apocalyptic number.

18992027 is a deficient number, since it is larger than the sum of its proper divisors (1).

18992027 is an equidigital number, since it uses as much as digits as its factorization.

18992027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 18992027 is about 4357.9842817523. The cubic root of 18992027 is about 266.8028347968.

The spelling of 18992027 in words is "eighteen million, nine hundred ninety-two thousand, twenty-seven".