1800000000047 has 2 divisors, whose sum is σ = 1800000000048. Its totient is φ = 1800000000046.

The previous prime is 1799999999977. The next prime is 1800000000083. The reversal of 1800000000047 is 7400000000081.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1800000000047 - 2³⁰ = 1798926258223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1799999999947 and 1800000000028.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1800000000647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 900000000023 + 900000000024.

It is an arithmetic number, because the mean of its divisors is an integer number (900000000024).

Almost surely, 2^{1800000000047} is an apocalyptic number.

1800000000047 is a deficient number, since it is larger than the sum of its proper divisors (1).

1800000000047 is an equidigital number, since it uses as much as digits as its factorization.

1800000000047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 20.

The spelling of 1800000000047 in words is "one trillion, eight hundred billion, forty-seven", and thus it is an aban number.