18502149047 has 2 divisors, whose sum is σ = 18502149048. Its totient is φ = 18502149046.

The previous prime is 18502149037. The next prime is 18502149157. The reversal of 18502149047 is 74094120581.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18502149047 - 2⁶ = 18502148983 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18502148995 and 18502149013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18502149037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9251074523 + 9251074524.

It is an arithmetic number, because the mean of its divisors is an integer number (9251074524).

Almost surely, 2^18502149047 is an apocalyptic number.

18502149047 is a deficient number, since it is larger than the sum of its proper divisors (1).

18502149047 is an equidigital number, since it uses as much as digits as its factorization.

18502149047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 41.

The spelling of 18502149047 in words is "eighteen billion, five hundred two million, one hundred forty-nine thousand, forty-seven".