18855914929 has 2 divisors, whose sum is σ = 18855914930. Its totient is φ = 18855914928.

The previous prime is 18855914911. The next prime is 18855914969. The reversal of 18855914929 is 92941955881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12156165025 + 6699749904 = 110255^2 + 81852^2 .

It is a cyclic number.

It is not a de Polignac number, because 18855914929 - 2⁵ = 18855914897 is a prime.

It is not a weakly prime, because it can be changed into another prime (18855914969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9427957464 + 9427957465.

It is an arithmetic number, because the mean of its divisors is an integer number (9427957465).

Almost surely, 2^18855914929 is an apocalyptic number.

It is an amenable number.

18855914929 is a deficient number, since it is larger than the sum of its proper divisors (1).

18855914929 is an equidigital number, since it uses as much as digits as its factorization.

18855914929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9331200, while the sum is 61.

The spelling of 18855914929 in words is "eighteen billion, eight hundred fifty-five million, nine hundred fourteen thousand, nine hundred twenty-nine".