18459644695481 has 32 divisors (see below), whose sum is σ = 20617988852736. Its totient is φ = 16385968872000.

The previous prime is 18459644695423. The next prime is 18459644695487.

It is a happy number.

18459644695481 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 18459644695481 - 2⁶ = 18459644695417 is a prime.

It is a super-2 number, since 2×18459644695481² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18459644695399 and 18459644695408.

It is not an unprimeable number, because it can be changed into a prime (18459644695487) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 321954986 + ... + 322012316.

It is an arithmetic number, because the mean of its divisors is an integer number (644312151648).

Almost surely, 2^{18459644695481} is an apocalyptic number.

18459644695481 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18459644695481 is a deficient number, since it is larger than the sum of its proper divisors (2158344157255).

18459644695481 is a wasteful number, since it uses less digits than its factorization.

18459644695481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61373.

The product of its digits is 1194393600, while the sum is 74.

The spelling of 18459644695481 in words is "eighteen trillion, four hundred fifty-nine billion, six hundred forty-four million, six hundred ninety-five thousand, four hundred eighty-one".