18401093 has 2 divisors, whose sum is σ = 18401094. Its totient is φ = 18401092.

The previous prime is 18401083. The next prime is 18401113. The reversal of 18401093 is 39010481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17698849 + 702244 = 4207^2 + 838^2 .

It is a cyclic number.

It is not a de Polignac number, because 18401093 - 2⁶ = 18401029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18401023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9200546 + 9200547.

It is an arithmetic number, because the mean of its divisors is an integer number (9200547).

Almost surely, 2^18401093 is an apocalyptic number.

It is an amenable number.

18401093 is a deficient number, since it is larger than the sum of its proper divisors (1).

18401093 is an equidigital number, since it uses as much as digits as its factorization.

18401093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 18401093 is about 4289.6495194829. The cubic root of 18401093 is about 264.0064516712.

The spelling of 18401093 in words is "eighteen million, four hundred one thousand, ninety-three".