20561082 has 16 divisors (see below), whose sum is σ = 41270880. Its totient is φ = 6828912.

The previous prime is 20561081. The next prime is 20561083. The reversal of 20561082 is 28016502.

It is an interprime number because it is at equal distance from previous prime (20561081) and next prime (20561083).

It is not an unprimeable number, because it can be changed into a prime (20561081) 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, 4357 + ... + 7752.

It is an arithmetic number, because the mean of its divisors is an integer number (2579430).

Almost surely, 2^20561082 is an apocalyptic number.

20561082 is an abundant number, since it is smaller than the sum of its proper divisors (20709798).

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

20561082 is a wasteful number, since it uses less digits than its factorization.

20561082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12397.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 20561082 is about 4534.4329303674. The cubic root of 20561082 is about 273.9567392230.

Adding to 20561082 its reverse (28016502), we get a palindrome (48577584).

The spelling of 20561082 in words is "twenty million, five hundred sixty-one thousand, eighty-two".