18258731047 has 2 divisors, whose sum is σ = 18258731048. Its totient is φ = 18258731046.

The previous prime is 18258731039. The next prime is 18258731053. The reversal of 18258731047 is 74013785281.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18258731047 - 2³ = 18258731039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18258730988 and 18258731006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18258731147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9129365523 + 9129365524.

It is an arithmetic number, because the mean of its divisors is an integer number (9129365524).

Almost surely, 2^18258731047 is an apocalyptic number.

18258731047 is a deficient number, since it is larger than the sum of its proper divisors (1).

18258731047 is an equidigital number, since it uses as much as digits as its factorization.

18258731047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 376320, while the sum is 46.

The spelling of 18258731047 in words is "eighteen billion, two hundred fifty-eight million, seven hundred thirty-one thousand, forty-seven".