18499577599481 has 16 divisors (see below), whose sum is σ = 21059718571008. Its totient is φ = 16085893414800.

The previous prime is 18499577599471. The next prime is 18499577599519.

18499577599481 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 18499577599481 - 2¹⁰ = 18499577598457 is a prime.

It is a super-2 number, since 2×18499577599481² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18499577599393 and 18499577599402.

It is not an unprimeable number, because it can be changed into a prime (18499577599441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4322900 + ... + 7462346.

It is an arithmetic number, because the mean of its divisors is an integer number (1316232410688).

Almost surely, 2^{18499577599481} is an apocalyptic number.

18499577599481 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18499577599481 is a deficient number, since it is larger than the sum of its proper divisors (2560140971527).

18499577599481 is a wasteful number, since it uses less digits than its factorization.

18499577599481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3162772.

The product of its digits is 8230118400, while the sum is 86.

The spelling of 18499577599481 in words is "eighteen trillion, four hundred ninety-nine billion, five hundred seventy-seven million, five hundred ninety-nine thousand, four hundred eighty-one".