16520478 has 16 divisors (see below), whose sum is σ = 35582736. Its totient is φ = 5083200.

The previous prime is 16520473. The next prime is 16520503. The reversal of 16520478 is 87402561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16520473) 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 7 ways as a sum of consecutive naturals, for example, 105823 + ... + 105978.

It is an arithmetic number, because the mean of its divisors is an integer number (2223921).

Almost surely, 2^16520478 is an apocalyptic number.

16520478 is an abundant number, since it is smaller than the sum of its proper divisors (19062258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16520478 is a wasteful number, since it uses less digits than its factorization.

16520478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211819.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 16520478 is about 4064.5390882608. The cubic root of 16520478 is about 254.6874448141.

The spelling of 16520478 in words is "sixteen million, five hundred twenty thousand, four hundred seventy-eight".