18846878101 has 2 divisors, whose sum is σ = 18846878102. Its totient is φ = 18846878100.

The previous prime is 18846878093. The next prime is 18846878111. The reversal of 18846878101 is 10187864881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18078147025 + 768731076 = 134455^2 + 27726^2 .

It is a cyclic number.

It is not a de Polignac number, because 18846878101 - 2³ = 18846878093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18846878111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9423439050 + 9423439051.

It is an arithmetic number, because the mean of its divisors is an integer number (9423439051).

Almost surely, 2^18846878101 is an apocalyptic number.

It is an amenable number.

18846878101 is a deficient number, since it is larger than the sum of its proper divisors (1).

18846878101 is an equidigital number, since it uses as much as digits as its factorization.

18846878101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 688128, while the sum is 52.

The spelling of 18846878101 in words is "eighteen billion, eight hundred forty-six million, eight hundred seventy-eight thousand, one hundred one".