18420211063 has 2 divisors, whose sum is σ = 18420211064. Its totient is φ = 18420211062.

The previous prime is 18420211057. The next prime is 18420211099. The reversal of 18420211063 is 36011202481.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18420211063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18420211763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9210105531 + 9210105532.

It is an arithmetic number, because the mean of its divisors is an integer number (9210105532).

Almost surely, 2^18420211063 is an apocalyptic number.

18420211063 is a deficient number, since it is larger than the sum of its proper divisors (1).

18420211063 is an equidigital number, since it uses as much as digits as its factorization.

18420211063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 28.

The spelling of 18420211063 in words is "eighteen billion, four hundred twenty million, two hundred eleven thousand, sixty-three".