20783323 has 6 divisors (see below), whose sum is σ = 22844612. Its totient is φ = 18893820.

The previous prime is 20783291. The next prime is 20783339. The reversal of 20783323 is 32338702.

It is not a de Polignac number, because 20783323 - 2⁵ = 20783291 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20783291 and 20783300.

It is not an unprimeable number, because it can be changed into a prime (20783363) 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 5 ways as a sum of consecutive naturals, for example, 85761 + ... + 86002.

Almost surely, 2^20783323 is an apocalyptic number.

20783323 is a deficient number, since it is larger than the sum of its proper divisors (2061289).

20783323 is a wasteful number, since it uses less digits than its factorization.

20783323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171785 (or 171774 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 20783323 is about 4558.8729966956. The cubic root of 20783323 is about 274.9402536872.

The spelling of 20783323 in words is "twenty million, seven hundred eighty-three thousand, three hundred twenty-three".