18853953218063 has 2 divisors, whose sum is σ = 18853953218064. Its totient is φ = 18853953218062.

The previous prime is 18853953218047. The next prime is 18853953218123. The reversal of 18853953218063 is 36081235935881.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18853953218063 - 2⁴ = 18853953218047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18853953217987 and 18853953218005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18853953218003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9426976609031 + 9426976609032.

It is an arithmetic number, because the mean of its divisors is an integer number (9426976609032).

Almost surely, 2^{18853953218063} is an apocalyptic number.

18853953218063 is a deficient number, since it is larger than the sum of its proper divisors (1).

18853953218063 is an equidigital number, since it uses as much as digits as its factorization.

18853953218063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37324800, while the sum is 62.

The spelling of 18853953218063 in words is "eighteen trillion, eight hundred fifty-three billion, nine hundred fifty-three million, two hundred eighteen thousand, sixty-three".