20832081 has 16 divisors (see below), whose sum is σ = 28621824. Its totient is φ = 13469904.

The previous prime is 20832079. The next prime is 20832101. The reversal of 20832081 is 18023802.

It is not a de Polignac number, because 20832081 - 2¹ = 20832079 is a prime.

It is a super-2 number, since 2×20832081² = 867951197581122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20832001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21060 + ... + 22026.

It is an arithmetic number, because the mean of its divisors is an integer number (1788864).

Almost surely, 2^20832081 is an apocalyptic number.

It is an amenable number.

20832081 is a deficient number, since it is larger than the sum of its proper divisors (7789743).

20832081 is a wasteful number, since it uses less digits than its factorization.

20832081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1180.

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 20832081 is about 4564.2174575715. The cubic root of 20832081 is about 275.1550904793.

Adding to 20832081 its reverse (18023802), we get a palindrome (38855883).

The spelling of 20832081 in words is "twenty million, eight hundred thirty-two thousand, eighty-one".