18939146663 has 2 divisors, whose sum is σ = 18939146664. Its totient is φ = 18939146662.

The previous prime is 18939146579. The next prime is 18939146719. The reversal of 18939146663 is 36664193981.

It is an a-pointer prime, because the next prime (18939146719) can be obtained adding 18939146663 to its sum of digits (56).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18939146663 - 2¹⁰ = 18939145639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18939146599 and 18939146608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18939166663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9469573331 + 9469573332.

It is an arithmetic number, because the mean of its divisors is an integer number (9469573332).

Almost surely, 2^18939146663 is an apocalyptic number.

18939146663 is a deficient number, since it is larger than the sum of its proper divisors (1).

18939146663 is an equidigital number, since it uses as much as digits as its factorization.

18939146663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5038848, while the sum is 56.

The spelling of 18939146663 in words is "eighteen billion, nine hundred thirty-nine million, one hundred forty-six thousand, six hundred sixty-three".