16530730 has 16 divisors (see below), whose sum is σ = 29922984. Its totient is φ = 6575040.

The previous prime is 16530727. The next prime is 16530737. The reversal of 16530730 is 3703561.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10582009 + 5948721 = 3253^2 + 2439^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16530695 and 16530704.

It is not an unprimeable number, because it can be changed into a prime (16530737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2757 + ... + 6376.

Almost surely, 2^16530730 is an apocalyptic number.

16530730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16530730 is a deficient number, since it is larger than the sum of its proper divisors (13392254).

16530730 is a wasteful number, since it uses less digits than its factorization.

16530730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9321.

The product of its (nonzero) digits is 1890, while the sum is 25.

The square root of 16530730 is about 4065.8000442717. The cubic root of 16530730 is about 254.7401171351.

The spelling of 16530730 in words is "sixteen million, five hundred thirty thousand, seven hundred thirty".