16468945 has 4 divisors (see below), whose sum is σ = 19762740. Its totient is φ = 13175152.

The previous prime is 16468939. The next prime is 16468997. The reversal of 16468945 is 54986461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54986461 = 4973 ⋅11057.

It can be written as a sum of positive squares in 2 ways, for example, as 12159169 + 4309776 = 3487^2 + 2076^2 .

It is a cyclic number.

It is not a de Polignac number, because 16468945 - 2¹³ = 16460753 is a prime.

It is a super-2 number, since 2×16468945² = 542452298826050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1646890 + ... + 1646899.

It is an arithmetic number, because the mean of its divisors is an integer number (4940685).

Almost surely, 2^16468945 is an apocalyptic number.

It is an amenable number.

16468945 is a deficient number, since it is larger than the sum of its proper divisors (3293795).

16468945 is an equidigital number, since it uses as much as digits as its factorization.

16468945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3293794.

The product of its digits is 207360, while the sum is 43.

The square root of 16468945 is about 4058.1947957189. The cubic root of 16468945 is about 254.4223500086.

The spelling of 16468945 in words is "sixteen million, four hundred sixty-eight thousand, nine hundred forty-five".