16923545 has 4 divisors (see below), whose sum is σ = 20308260. Its totient is φ = 13538832.

The previous prime is 16923539. The next prime is 16923563. The reversal of 16923545 is 54532961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54532961 = 7 ⋅7790423.

It can be written as a sum of positive squares in 2 ways, for example, as 11485321 + 5438224 = 3389^2 + 2332^2 .

It is a cyclic number.

It is not a de Polignac number, because 16923545 - 2⁶ = 16923481 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1692350 + ... + 1692359.

It is an arithmetic number, because the mean of its divisors is an integer number (5077065).

Almost surely, 2^16923545 is an apocalyptic number.

It is an amenable number.

16923545 is a deficient number, since it is larger than the sum of its proper divisors (3384715).

16923545 is an equidigital number, since it uses as much as digits as its factorization.

16923545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3384714.

The product of its digits is 32400, while the sum is 35.

The square root of 16923545 is about 4113.8236471682. The cubic root of 16923545 is about 256.7421143989.

The spelling of 16923545 in words is "sixteen million, nine hundred twenty-three thousand, five hundred forty-five".