2004555218 has 4 divisors (see below), whose sum is σ = 3006832830. Its totient is φ = 1002277608.

The previous prime is 2004555211. The next prime is 2004555349. The reversal of 2004555218 is 8125554002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8125554002 = 2 ⋅4062777001.

It can be written as a sum of positive squares in only one way, i.e., 1446509089 + 558046129 = 38033^2 + 23623^2 .

It is a super-2 number, since 2×2004555218² = 8036483244022055048, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2004555211) 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 as a sum of consecutive naturals, namely, 501138803 + ... + 501138806.

Almost surely, 2^2004555218 is an apocalyptic number.

2004555218 is a deficient number, since it is larger than the sum of its proper divisors (1002277612).

2004555218 is a wasteful number, since it uses less digits than its factorization.

2004555218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1002277611.

The product of its (nonzero) digits is 16000, while the sum is 32.

The square root of 2004555218 is about 44772.2594694527. The cubic root of 2004555218 is about 1260.8768604483.

The spelling of 2004555218 in words is "two billion, four million, five hundred fifty-five thousand, two hundred eighteen".