16504037 has 6 divisors (see below), whose sum is σ = 18140934. Its totient is φ = 15003560.

The previous prime is 16503953. The next prime is 16504049. The reversal of 16504037 is 73040561.

It can be written as a sum of positive squares in only one way, i.e., 10962721 + 5541316 = 3311^2 + 2354^2 .

It is not a de Polignac number, because 16504037 - 2¹⁸ = 16241893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16503997 and 16504015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16506037) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 68078 + ... + 68319.

It is an arithmetic number, because the mean of its divisors is an integer number (3023489).

Almost surely, 2^16504037 is an apocalyptic number.

It is an amenable number.

16504037 is a deficient number, since it is larger than the sum of its proper divisors (1636897).

16504037 is a wasteful number, since it uses less digits than its factorization.

16504037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136419 (or 136408 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 16504037 is about 4062.5160922758. The cubic root of 16504037 is about 254.6029293801.

Adding to 16504037 its reverse (73040561), we get a palindrome (89544598).

The spelling of 16504037 in words is "sixteen million, five hundred four thousand, thirty-seven".