16520499 has 12 divisors (see below), whose sum is σ = 24445512. Its totient is φ = 10744800.

The previous prime is 16520473. The next prime is 16520503. The reversal of 16520499 is 99402561.

16520499 is a `hidden beast` number, since 165 + 2 + 0 + 499 = 666.

It is not a de Polignac number, because 16520499 - 2²⁰ = 15471923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16520429) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 22017 + ... + 22754.

It is an arithmetic number, because the mean of its divisors is an integer number (2037126).

Almost surely, 2^16520499 is an apocalyptic number.

16520499 is a deficient number, since it is larger than the sum of its proper divisors (7925013).

16520499 is a wasteful number, since it uses less digits than its factorization.

16520499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44818 (or 44815 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 16520499 is about 4064.5416715787. The cubic root of 16520499 is about 254.6875527294.

The spelling of 16520499 in words is "sixteen million, five hundred twenty thousand, four hundred ninety-nine".