18672004 has 24 divisors (see below), whose sum is σ = 35459928. Its totient is φ = 8551680.

The previous prime is 18671993. The next prime is 18672053. The reversal of 18672004 is 40027681.

It can be written as a sum of positive squares in 4 ways, for example, as 3069504 + 15602500 = 1752^2 + 3950^2 .

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5814 + ... + 8434.

It is an arithmetic number, because the mean of its divisors is an integer number (1477497).

Almost surely, 2^18672004 is an apocalyptic number.

It is an amenable number.

18672004 is a deficient number, since it is larger than the sum of its proper divisors (16787924).

18672004 is a wasteful number, since it uses less digits than its factorization.

18672004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2775 (or 2773 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 18672004 is about 4321.1114311020. Note that the first 3 decimals coincide. The cubic root of 18672004 is about 265.2957609203.

Adding to 18672004 its reverse (40027681), we get a palindrome (58699685).

The spelling of 18672004 in words is "eighteen million, six hundred seventy-two thousand, four".