18445715801 has 4 divisors (see below), whose sum is σ = 18541289652. Its totient is φ = 18350141952.

The previous prime is 18445715791. The next prime is 18445715803. The reversal of 18445715801 is 10851754481.

It is a happy number.

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 13665376201 + 4780339600 = 116899^2 + 69140^2 .

It is a cyclic number.

It is not a de Polignac number, because 18445715801 - 2¹⁴ = 18445699417 is a prime.

It is a super-3 number, since 3×18445715801³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18445715803) 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, 47786636 + ... + 47787021.

It is an arithmetic number, because the mean of its divisors is an integer number (4635322413).

Almost surely, 2^18445715801 is an apocalyptic number.

It is an amenable number.

18445715801 is a deficient number, since it is larger than the sum of its proper divisors (95573851).

18445715801 is an equidigital number, since it uses as much as digits as its factorization.

18445715801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95573850.

The product of its (nonzero) digits is 179200, while the sum is 44.

The spelling of 18445715801 in words is "eighteen billion, four hundred forty-five million, seven hundred fifteen thousand, eight hundred one".