16923455 has 4 divisors (see below), whose sum is σ = 20308152. Its totient is φ = 13538760.

The previous prime is 16923437. The next prime is 16923457. The reversal of 16923455 is 55432961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55432961 = 83 ⋅667867.

It is not a de Polignac number, because 16923455 - 2⁶ = 16923391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16923457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1692341 + ... + 1692350.

It is an arithmetic number, because the mean of its divisors is an integer number (5077038).

Almost surely, 2^16923455 is an apocalyptic number.

16923455 is a deficient number, since it is larger than the sum of its proper divisors (3384697).

16923455 is an equidigital number, since it uses as much as digits as its factorization.

16923455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3384696.

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

The square root of 16923455 is about 4113.8127084251. The cubic root of 16923455 is about 256.7416592770.

The spelling of 16923455 in words is "sixteen million, nine hundred twenty-three thousand, four hundred fifty-five".