18667200229 has 2 divisors, whose sum is σ = 18667200230. Its totient is φ = 18667200228.

The previous prime is 18667200221. The next prime is 18667200257. The reversal of 18667200229 is 92200276681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12738508225 + 5928692004 = 112865^2 + 76998^2 .

It is a cyclic number.

It is not a de Polignac number, because 18667200229 - 2³ = 18667200221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18667200221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9333600114 + 9333600115.

It is an arithmetic number, because the mean of its divisors is an integer number (9333600115).

Almost surely, 2^18667200229 is an apocalyptic number.

It is an amenable number.

18667200229 is a deficient number, since it is larger than the sum of its proper divisors (1).

18667200229 is an equidigital number, since it uses as much as digits as its factorization.

18667200229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 43.

The spelling of 18667200229 in words is "eighteen billion, six hundred sixty-seven million, two hundred thousand, two hundred twenty-nine".