16513040 has 20 divisors (see below), whose sum is σ = 38393004. Its totient is φ = 6605184.

The previous prime is 16513031. The next prime is 16513073. The reversal of 16513040 is 4031561.

It can be written as a sum of positive squares in 2 ways, for example, as 4596736 + 11916304 = 2144^2 + 3452^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 103127 + ... + 103286.

Almost surely, 2^16513040 is an apocalyptic number.

16513040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16513040 is an abundant number, since it is smaller than the sum of its proper divisors (21879964).

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

16513040 is a wasteful number, since it uses less digits than its factorization.

16513040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206426 (or 206420 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 16513040 is about 4063.6239983542. The cubic root of 16513040 is about 254.6492165097.

The spelling of 16513040 in words is "sixteen million, five hundred thirteen thousand, forty".