16823943 has 20 divisors (see below), whose sum is σ = 25269640. Its totient is φ = 11154672.

The previous prime is 16823923. The next prime is 16823953. The reversal of 16823943 is 34932861.

It is not a de Polignac number, because 16823943 - 2⁸ = 16823687 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16823898 and 16823907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16823903) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 18096 + ... + 19002.

It is an arithmetic number, because the mean of its divisors is an integer number (1263482).

Almost surely, 2^16823943 is an apocalyptic number.

16823943 is a deficient number, since it is larger than the sum of its proper divisors (8445697).

16823943 is an equidigital number, since it uses as much as digits as its factorization.

16823943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1148 (or 1139 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 16823943 is about 4101.7000134091. The cubic root of 16823943 is about 256.2374455083.

It can be divided in two parts, 16823 and 943, that added together give a triangular number (17766 = T₁₈₈).

The spelling of 16823943 in words is "sixteen million, eight hundred twenty-three thousand, nine hundred forty-three".