16620946 has 8 divisors (see below), whose sum is σ = 24962364. Its totient is φ = 8300160.

The previous prime is 16620943. The next prime is 16620971. The reversal of 16620946 is 64902661.

It can be written as a sum of positive squares in 2 ways, for example, as 16524225 + 96721 = 4065^2 + 311^2 .

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

It is not an unprimeable number, because it can be changed into a prime (16620941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2955 + ... + 6478.

Almost surely, 2^16620946 is an apocalyptic number.

16620946 is a deficient number, since it is larger than the sum of its proper divisors (8341418).

16620946 is an equidigital number, since it uses as much as digits as its factorization.

16620946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10316.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 16620946 is about 4076.8794438884. The cubic root of 16620946 is about 255.2026890339.

It can be divided in two parts, 166 and 20946, that added together give a palindrome (21112).

The spelling of 16620946 in words is "sixteen million, six hundred twenty thousand, nine hundred forty-six".