20782113 has 12 divisors (see below), whose sum is σ = 30458064. Its totient is φ = 12595000.

The previous prime is 20782103. The next prime is 20782117. The reversal of 20782113 is 31128702.

It is not a de Polignac number, because 20782113 - 2⁵ = 20782081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20782117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28263 + ... + 28988.

It is an arithmetic number, because the mean of its divisors is an integer number (2538172).

Almost surely, 2^20782113 is an apocalyptic number.

It is an amenable number.

20782113 is a deficient number, since it is larger than the sum of its proper divisors (9675951).

20782113 is a wasteful number, since it uses less digits than its factorization.

20782113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57276 (or 57265 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 20782113 is about 4558.7402865265. The cubic root of 20782113 is about 274.9349179321.

The spelling of 20782113 in words is "twenty million, seven hundred eighty-two thousand, one hundred thirteen".