18912849227 has 2 divisors, whose sum is σ = 18912849228. Its totient is φ = 18912849226.

The previous prime is 18912849203. The next prime is 18912849257. The reversal of 18912849227 is 72294821981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18912849227 - 2²⁴ = 18896072011 is a prime.

It is not a weakly prime, because it can be changed into another prime (18912849257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9456424613 + 9456424614.

It is an arithmetic number, because the mean of its divisors is an integer number (9456424614).

Almost surely, 2^18912849227 is an apocalyptic number.

18912849227 is a deficient number, since it is larger than the sum of its proper divisors (1).

18912849227 is an equidigital number, since it uses as much as digits as its factorization.

18912849227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 53.

The spelling of 18912849227 in words is "eighteen billion, nine hundred twelve million, eight hundred forty-nine thousand, two hundred twenty-seven".