20782077 has 8 divisors (see below), whose sum is σ = 27832416. Its totient is φ = 13793232.

The previous prime is 20782061. The next prime is 20782081. The reversal of 20782077 is 77028702.

It is a happy number.

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

It is not a de Polignac number, because 20782077 - 2⁴ = 20782061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20782277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14578 + ... + 15939.

It is an arithmetic number, because the mean of its divisors is an integer number (3479052).

Almost surely, 2^20782077 is an apocalyptic number.

It is an amenable number.

20782077 is a deficient number, since it is larger than the sum of its proper divisors (7050339).

20782077 is a wasteful number, since it uses less digits than its factorization.

20782077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30747.

The product of its (nonzero) digits is 10976, while the sum is 33.

The square root of 20782077 is about 4558.7363380656. The cubic root of 20782077 is about 274.9347591792.

The spelling of 20782077 in words is "twenty million, seven hundred eighty-two thousand, seventy-seven".