18419101 has 2 divisors, whose sum is σ = 18419102. Its totient is φ = 18419100.

The previous prime is 18419069. The next prime is 18419117. The reversal of 18419101 is 10191481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18071001 + 348100 = 4251^2 + 590^2 .

It is an emirp because it is prime and its reverse (10191481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18419101 - 2⁵ = 18419069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18419161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9209550 + 9209551.

It is an arithmetic number, because the mean of its divisors is an integer number (9209551).

Almost surely, 2^18419101 is an apocalyptic number.

It is an amenable number.

18419101 is a deficient number, since it is larger than the sum of its proper divisors (1).

18419101 is an equidigital number, since it uses as much as digits as its factorization.

18419101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 25.

The square root of 18419101 is about 4291.7480121741. The cubic root of 18419101 is about 264.0925457986.

The spelling of 18419101 in words is "eighteen million, four hundred nineteen thousand, one hundred one".