20720682 has 48 divisors (see below), whose sum is σ = 46332000. Its totient is φ = 6689952.

The previous prime is 20720681. The next prime is 20720717. The reversal of 20720682 is 28602702.

It is not an unprimeable number, because it can be changed into a prime (20720681) 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 23 ways as a sum of consecutive naturals, for example, 115669 + ... + 115847.

It is an arithmetic number, because the mean of its divisors is an integer number (965250).

Almost surely, 2^20720682 is an apocalyptic number.

20720682 is an abundant number, since it is smaller than the sum of its proper divisors (25611318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20720682 is a wasteful number, since it uses less digits than its factorization.

20720682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355 (or 352 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 20720682 is about 4551.9975834791. The cubic root of 20720682 is about 274.6637521161.

The spelling of 20720682 in words is "twenty million, seven hundred twenty thousand, six hundred eighty-two".