16520345 has 16 divisors (see below), whose sum is σ = 21098880. Its totient is φ = 12374784.

The previous prime is 16520333. The next prime is 16520347. The reversal of 16520345 is 54302561.

16520345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 16520345 - 2⁶ = 16520281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16520347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21986 + ... + 22724.

It is an arithmetic number, because the mean of its divisors is an integer number (1318680).

Almost surely, 2^16520345 is an apocalyptic number.

It is an amenable number.

16520345 is a deficient number, since it is larger than the sum of its proper divisors (4578535).

16520345 is a wasteful number, since it uses less digits than its factorization.

16520345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1024.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 16520345 is about 4064.5227272092. The cubic root of 16520345 is about 254.6867613488.

The spelling of 16520345 in words is "sixteen million, five hundred twenty thousand, three hundred forty-five".