16530643 has 8 divisors (see below), whose sum is σ = 16806608. Its totient is φ = 16257024.

The previous prime is 16530623. The next prime is 16530653. The reversal of 16530643 is 34603561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16530643 - 2⁵ = 16530611 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16530623) 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, 18280 + ... + 19162.

It is an arithmetic number, because the mean of its divisors is an integer number (2100826).

Almost surely, 2^16530643 is an apocalyptic number.

16530643 is a deficient number, since it is larger than the sum of its proper divisors (275965).

16530643 is an equidigital number, since it uses as much as digits as its factorization.

16530643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1173.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 16530643 is about 4065.7893452563. The cubic root of 16530643 is about 254.7396702416.

The spelling of 16530643 in words is "sixteen million, five hundred thirty thousand, six hundred forty-three".