18508464929 has 2 divisors, whose sum is σ = 18508464930. Its totient is φ = 18508464928.

The previous prime is 18508464917. The next prime is 18508464937. The reversal of 18508464929 is 92946480581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16371714304 + 2136750625 = 127952^2 + 46225^2 .

It is a cyclic number.

It is not a de Polignac number, because 18508464929 - 2³² = 14213497633 is a prime.

It is not a weakly prime, because it can be changed into another prime (18508466929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9254232464 + 9254232465.

It is an arithmetic number, because the mean of its divisors is an integer number (9254232465).

Almost surely, 2^18508464929 is an apocalyptic number.

It is an amenable number.

18508464929 is a deficient number, since it is larger than the sum of its proper divisors (1).

18508464929 is an equidigital number, since it uses as much as digits as its factorization.

18508464929 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4976640, while the sum is 56.

The spelling of 18508464929 in words is "eighteen billion, five hundred eight million, four hundred sixty-four thousand, nine hundred twenty-nine".