18990100011101 has 2 divisors, whose sum is σ = 18990100011102. Its totient is φ = 18990100011100.

The previous prime is 18990100011059. The next prime is 18990100011133. The reversal of 18990100011101 is 10111000109981.

It is an a-pointer prime, because the next prime (18990100011133) can be obtained adding 18990100011101 to its sum of digits (32).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18652672627876 + 337427383225 = 4318874^2 + 580885^2 .

It is an emirp because it is prime and its reverse (10111000109981) is a distict prime. It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 10111000106681 and 18660100011101.

It is a cyclic number.

It is not a de Polignac number, because 18990100011101 - 2³⁰ = 18989026269277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18990100011901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9495050005550 + 9495050005551.

It is an arithmetic number, because the mean of its divisors is an integer number (9495050005551).

Almost surely, 2^{18990100011101} is an apocalyptic number.

It is an amenable number.

18990100011101 is a deficient number, since it is larger than the sum of its proper divisors (1).

18990100011101 is an equidigital number, since it uses as much as digits as its factorization.

18990100011101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 32.

The spelling of 18990100011101 in words is "eighteen trillion, nine hundred ninety billion, one hundred million, eleven thousand, one hundred one".