18385822001 has 2 divisors, whose sum is σ = 18385822002. Its totient is φ = 18385822000.

The previous prime is 18385821991. The next prime is 18385822043. The reversal of 18385822001 is 10022858381.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14933084401 + 3452737600 = 122201^2 + 58760^2 .

It is an emirp because it is prime and its reverse (10022858381) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18385822001 is a prime.

It is not a weakly prime, because it can be changed into another prime (18385822901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9192911000 + 9192911001.

It is an arithmetic number, because the mean of its divisors is an integer number (9192911001).

Almost surely, 2^18385822001 is an apocalyptic number.

It is an amenable number.

18385822001 is a deficient number, since it is larger than the sum of its proper divisors (1).

18385822001 is an equidigital number, since it uses as much as digits as its factorization.

18385822001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30720, while the sum is 38.

The spelling of 18385822001 in words is "eighteen billion, three hundred eighty-five million, eight hundred twenty-two thousand, one".