20782080249 has 8 divisors (see below), whose sum is σ = 31667931840. Its totient is φ = 11875474416.

The previous prime is 20782080227. The next prime is 20782080269. The reversal of 20782080249 is 94208028702.

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

It is not a de Polignac number, because 20782080249 - 2⁵ = 20782080217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20782080249.

It is not an unprimeable number, because it can be changed into a prime (20782080269) 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 7 ways as a sum of consecutive naturals, for example, 494811414 + ... + 494811455.

It is an arithmetic number, because the mean of its divisors is an integer number (3958491480).

Almost surely, 2^20782080249 is an apocalyptic number.

It is an amenable number.

20782080249 is a deficient number, since it is larger than the sum of its proper divisors (10885851591).

20782080249 is an equidigital number, since it uses as much as digits as its factorization.

20782080249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989622879.

The product of its (nonzero) digits is 129024, while the sum is 42.

The spelling of 20782080249 in words is "twenty billion, seven hundred eighty-two million, eighty thousand, two hundred forty-nine".