18227197147 has 2 divisors, whose sum is σ = 18227197148. Its totient is φ = 18227197146.

The previous prime is 18227197057. The next prime is 18227197169. The reversal of 18227197147 is 74179172281.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18227197147 - 2³¹ = 16079713499 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18227197147.

It is not a weakly prime, because it can be changed into another prime (18227192147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9113598573 + 9113598574.

It is an arithmetic number, because the mean of its divisors is an integer number (9113598574).

Almost surely, 2^18227197147 is an apocalyptic number.

18227197147 is a deficient number, since it is larger than the sum of its proper divisors (1).

18227197147 is an equidigital number, since it uses as much as digits as its factorization.

18227197147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 395136, while the sum is 49.

The spelling of 18227197147 in words is "eighteen billion, two hundred twenty-seven million, one hundred ninety-seven thousand, one hundred forty-seven".