18684066101 has 2 divisors, whose sum is σ = 18684066102. Its totient is φ = 18684066100.

The previous prime is 18684066073. The next prime is 18684066127. The reversal of 18684066101 is 10166048681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12505948900 + 6178117201 = 111830^2 + 78601^2 .

It is a cyclic number.

It is not a de Polignac number, because 18684066101 - 2¹⁰ = 18684065077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18684066161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9342033050 + 9342033051.

It is an arithmetic number, because the mean of its divisors is an integer number (9342033051).

Almost surely, 2^18684066101 is an apocalyptic number.

It is an amenable number.

18684066101 is a deficient number, since it is larger than the sum of its proper divisors (1).

18684066101 is an equidigital number, since it uses as much as digits as its factorization.

18684066101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55296, while the sum is 41.

The spelling of 18684066101 in words is "eighteen billion, six hundred eighty-four million, sixty-six thousand, one hundred one".