18450101 has 2 divisors, whose sum is σ = 18450102. Its totient is φ = 18450100.

The previous prime is 18450059. The next prime is 18450109. The reversal of 18450101 is 10105481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14938225 + 3511876 = 3865^2 + 1874^2 .

It is an emirp because it is prime and its reverse (10105481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18450101 - 2⁶ = 18450037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18450109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9225050 + 9225051.

It is an arithmetic number, because the mean of its divisors is an integer number (9225051).

Almost surely, 2^18450101 is an apocalyptic number.

It is an amenable number.

18450101 is a deficient number, since it is larger than the sum of its proper divisors (1).

18450101 is an equidigital number, since it uses as much as digits as its factorization.

18450101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 160, while the sum is 20.

The square root of 18450101 is about 4295.3580758768. The cubic root of 18450101 is about 264.2406217965.

Adding to 18450101 its reverse (10105481), we get a palindrome (28555582).

The spelling of 18450101 in words is "eighteen million, four hundred fifty thousand, one hundred one".