16323381 has 12 divisors (see below), whose sum is σ = 23613408. Its totient is φ = 10866024.

The previous prime is 16323379. The next prime is 16323407. The reversal of 16323381 is 18332361.

It is a happy number.

It is not a de Polignac number, because 16323381 - 2¹ = 16323379 is a prime.

It is a super-2 number, since 2×16323381² = 532905534542322, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16323301) 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 11 ways as a sum of consecutive naturals, for example, 10266 + ... + 11748.

It is an arithmetic number, because the mean of its divisors is an integer number (1967784).

Almost surely, 2^16323381 is an apocalyptic number.

It is an amenable number.

16323381 is a deficient number, since it is larger than the sum of its proper divisors (7290027).

16323381 is a wasteful number, since it uses less digits than its factorization.

16323381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2712 (or 2709 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 16323381 is about 4040.2204147794. The cubic root of 16323381 is about 253.6705433639.

The spelling of 16323381 in words is "sixteen million, three hundred twenty-three thousand, three hundred eighty-one".