16518004 has 6 divisors (see below), whose sum is σ = 28906514. Its totient is φ = 8259000.

The previous prime is 16517983. The next prime is 16518013. The reversal of 16518004 is 40081561.

It can be written as a sum of positive squares in only one way, i.e., 16160400 + 357604 = 4020^2 + 598^2 .

It is a super-2 number, since 2×16518004² = 545688912288032, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16518004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2064747 + ... + 2064754.

Almost surely, 2^16518004 is an apocalyptic number.

It is an amenable number.

16518004 is a deficient number, since it is larger than the sum of its proper divisors (12388510).

16518004 is a wasteful number, since it uses less digits than its factorization.

16518004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4129505 (or 4129503 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 16518004 is about 4064.2347373153. The cubic root of 16518004 is about 254.6747307309.

Adding to 16518004 its reverse (40081561), we get a palindrome (56599565).

The spelling of 16518004 in words is "sixteen million, five hundred eighteen thousand, four".