20782042 has 16 divisors (see below), whose sum is σ = 32309280. Its totient is φ = 10019152.

The previous prime is 20782031. The next prime is 20782043. The reversal of 20782042 is 24028702.

It is a junction number, because it is equal to n+sod(n) for n = 20781998 and 20782016.

It is not an unprimeable number, because it can be changed into a prime (20782043) 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, 4593 + ... + 7915.

It is an arithmetic number, because the mean of its divisors is an integer number (2019330).

Almost surely, 2^20782042 is an apocalyptic number.

20782042 is a deficient number, since it is larger than the sum of its proper divisors (11527238).

20782042 is a wasteful number, since it uses less digits than its factorization.

20782042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3437.

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 20782042 is about 4558.7324992809. The cubic root of 20782042 is about 274.9346048359.

The spelling of 20782042 in words is "twenty million, seven hundred eighty-two thousand, forty-two".