18122484557 has 6 divisors (see below), whose sum is σ = 18182057994. Its totient is φ = 18062926560.

The previous prime is 18122484509. The next prime is 18122484559. The reversal of 18122484557 is 75548422181.

It can be written as a sum of positive squares in 3 ways, for example, as 439070116 + 17683414441 = 20954^2 + 132979^2 .

It is not a de Polignac number, because 18122484557 - 2⁶ = 18122484493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18122484559) 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 5 ways as a sum of consecutive naturals, for example, 2393057 + ... + 2400617.

It is an arithmetic number, because the mean of its divisors is an integer number (3030342999).

Almost surely, 2^18122484557 is an apocalyptic number.

It is an amenable number.

18122484557 is a deficient number, since it is larger than the sum of its proper divisors (59573437).

18122484557 is an frugal number, since it uses more digits than its factorization.

18122484557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15439 (or 7878 counting only the distinct ones).

The product of its digits is 716800, while the sum is 47.

The spelling of 18122484557 in words is "eighteen billion, one hundred twenty-two million, four hundred eighty-four thousand, five hundred fifty-seven".