18429044197 has 2 divisors, whose sum is σ = 18429044198. Its totient is φ = 18429044196.

The previous prime is 18429044173. The next prime is 18429044201. The reversal of 18429044197 is 79144092481.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17500379521 + 928664676 = 132289^2 + 30474^2 .

It is an emirp because it is prime and its reverse (79144092481) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18429044197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18429044197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18429044597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9214522098 + 9214522099.

It is an arithmetic number, because the mean of its divisors is an integer number (9214522099).

Almost surely, 2^18429044197 is an apocalyptic number.

It is an amenable number.

18429044197 is a deficient number, since it is larger than the sum of its proper divisors (1).

18429044197 is an equidigital number, since it uses as much as digits as its factorization.

18429044197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 580608, while the sum is 49.

The spelling of 18429044197 in words is "eighteen billion, four hundred twenty-nine million, forty-four thousand, one hundred ninety-seven".