16520395 has 4 divisors (see below), whose sum is σ = 19824480. Its totient is φ = 13216312.

The previous prime is 16520377. The next prime is 16520429. The reversal of 16520395 is 59302561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16520395 - 2⁵ = 16520363 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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 in 3 ways as a sum of consecutive naturals, for example, 1652035 + ... + 1652044.

It is an arithmetic number, because the mean of its divisors is an integer number (4956120).

Almost surely, 2^16520395 is an apocalyptic number.

16520395 is a deficient number, since it is larger than the sum of its proper divisors (3304085).

16520395 is an equidigital number, since it uses as much as digits as its factorization.

16520395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3304084.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 16520395 is about 4064.5288779882. The cubic root of 16520395 is about 254.6870182911.

The spelling of 16520395 in words is "sixteen million, five hundred twenty thousand, three hundred ninety-five".