18844458601 has 4 divisors (see below), whose sum is σ = 19663782912. Its totient is φ = 18025134292.

The previous prime is 18844458583. The next prime is 18844458623. The reversal of 18844458601 is 10685444881.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18844458601 - 2¹³ = 18844450409 is a prime.

It is a super-2 number, since 2×18844458601² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18844458671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 409662121 + ... + 409662166.

It is an arithmetic number, because the mean of its divisors is an integer number (4915945728).

Almost surely, 2^18844458601 is an apocalyptic number.

It is an amenable number.

18844458601 is a deficient number, since it is larger than the sum of its proper divisors (819324311).

18844458601 is an equidigital number, since it uses as much as digits as its factorization.

18844458601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819324310.

The product of its (nonzero) digits is 983040, while the sum is 49.

The spelling of 18844458601 in words is "eighteen billion, eight hundred forty-four million, four hundred fifty-eight thousand, six hundred one".