18004180557 has 16 divisors (see below), whose sum is σ = 27326504448. Its totient is φ = 10437205680.

The previous prime is 18004180549. The next prime is 18004180559. The reversal of 18004180557 is 75508140081.

It is not a de Polignac number, because 18004180557 - 2³ = 18004180549 is a prime.

It is a super-3 number, since 3×18004180557³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18004180559) 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 15 ways as a sum of consecutive naturals, for example, 11859703 + ... + 11861220.

It is an arithmetic number, because the mean of its divisors is an integer number (1707906528).

Almost surely, 2^18004180557 is an apocalyptic number.

It is an amenable number.

18004180557 is a deficient number, since it is larger than the sum of its proper divisors (9322323891).

18004180557 is a wasteful number, since it uses less digits than its factorization.

18004180557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23720960.

The product of its (nonzero) digits is 44800, while the sum is 39.

The spelling of 18004180557 in words is "eighteen billion, four million, one hundred eighty thousand, five hundred fifty-seven".