16821043383 has 16 divisors (see below), whose sum is σ = 22964276736. Its totient is φ = 10948882560.

The previous prime is 16821043367. The next prime is 16821043409. The reversal of 16821043383 is 38334012861.

It is not a de Polignac number, because 16821043383 - 2⁴ = 16821043367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16821043483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 347583 + ... + 393008.

It is an arithmetic number, because the mean of its divisors is an integer number (1435267296).

Almost surely, 2^16821043383 is an apocalyptic number.

16821043383 is a deficient number, since it is larger than the sum of its proper divisors (6143233353).

16821043383 is a wasteful number, since it uses less digits than its factorization.

16821043383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740774.

The product of its (nonzero) digits is 82944, while the sum is 39.

The spelling of 16821043383 in words is "sixteen billion, eight hundred twenty-one million, forty-three thousand, three hundred eighty-three".