18605801 has 2 divisors, whose sum is σ = 18605802. Its totient is φ = 18605800.

The previous prime is 18605777. The next prime is 18605863. The reversal of 18605801 is 10850681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13987600 + 4618201 = 3740^2 + 2149^2 .

It is a cyclic number.

It is not a de Polignac number, because 18605801 - 2⁶ = 18605737 is a prime.

It is not a weakly prime, because it can be changed into another prime (18605891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9302900 + 9302901.

It is an arithmetic number, because the mean of its divisors is an integer number (9302901).

Almost surely, 2^18605801 is an apocalyptic number.

It is an amenable number.

18605801 is a deficient number, since it is larger than the sum of its proper divisors (1).

18605801 is an equidigital number, since it uses as much as digits as its factorization.

18605801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 29.

The square root of 18605801 is about 4313.4442154733. Note that the first 3 decimals coincide. The cubic root of 18605801 is about 264.9818475759.

The spelling of 18605801 in words is "eighteen million, six hundred five thousand, eight hundred one".