18820338601 has 4 divisors (see below), whose sum is σ = 19128868804. Its totient is φ = 18511808400.

The previous prime is 18820338587. The next prime is 18820338611. The reversal of 18820338601 is 10683302881.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 830822976 + 17989515625 = 28824^2 + 134125^2 .

It is a cyclic number.

It is not a de Polignac number, because 18820338601 - 2¹⁹ = 18819814313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18820338611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154265010 + ... + 154265131.

It is an arithmetic number, because the mean of its divisors is an integer number (4782217201).

Almost surely, 2^18820338601 is an apocalyptic number.

It is an amenable number.

18820338601 is a deficient number, since it is larger than the sum of its proper divisors (308530203).

18820338601 is an equidigital number, since it uses as much as digits as its factorization.

18820338601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308530202.

The product of its (nonzero) digits is 55296, while the sum is 40.

The spelling of 18820338601 in words is "eighteen billion, eight hundred twenty million, three hundred thirty-eight thousand, six hundred one".