18211001147 has 2 divisors, whose sum is σ = 18211001148. Its totient is φ = 18211001146.

The previous prime is 18211001113. The next prime is 18211001161. The reversal of 18211001147 is 74110011281.

It is a strong prime.

It is an emirp because it is prime and its reverse (74110011281) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18211001147 - 2⁸ = 18211000891 is a prime.

It is not a weakly prime, because it can be changed into another prime (18211001197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9105500573 + 9105500574.

It is an arithmetic number, because the mean of its divisors is an integer number (9105500574).

Almost surely, 2^18211001147 is an apocalyptic number.

18211001147 is a deficient number, since it is larger than the sum of its proper divisors (1).

18211001147 is an equidigital number, since it uses as much as digits as its factorization.

18211001147 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 26.

The spelling of 18211001147 in words is "eighteen billion, two hundred eleven million, one thousand, one hundred forty-seven".