20782329 has 8 divisors (see below), whose sum is σ = 27737472. Its totient is φ = 13841040.

The previous prime is 20782327. The next prime is 20782331. The reversal of 20782329 is 92328702.

It is an interprime number because it is at equal distance from previous prime (20782327) and next prime (20782331).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20782329 - 2¹ = 20782327 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20782329.

It is not an unprimeable number, because it can be changed into a prime (20782327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 784 + ... + 6494.

It is an arithmetic number, because the mean of its divisors is an integer number (3467184).

Almost surely, 2^20782329 is an apocalyptic number.

It is an amenable number.

20782329 is a deficient number, since it is larger than the sum of its proper divisors (6955143).

20782329 is a wasteful number, since it uses less digits than its factorization.

20782329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6927.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 20782329 is about 4558.7639772201. The cubic root of 20782329 is about 274.9358704457.

The spelling of 20782329 in words is "twenty million, seven hundred eighty-two thousand, three hundred twenty-nine".