16520450 has 12 divisors (see below), whose sum is σ = 30728130. Its totient is φ = 6608160.

The previous prime is 16520429. The next prime is 16520473. The reversal of 16520450 is 5402561.

It can be written as a sum of positive squares in 3 ways, for example, as 12837889 + 3682561 = 3583^2 + 1919^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 165155 + ... + 165254.

Almost surely, 2^16520450 is an apocalyptic number.

16520450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16520450 is a deficient number, since it is larger than the sum of its proper divisors (14207680).

16520450 is a wasteful number, since it uses less digits than its factorization.

16520450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330421 (or 330416 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 16520450 is about 4064.5356438344. The cubic root of 16520450 is about 254.6873009270.

The spelling of 16520450 in words is "sixteen million, five hundred twenty thousand, four hundred fifty".