20841081 has 16 divisors (see below), whose sum is σ = 29491200. Its totient is φ = 13054608.

The previous prime is 20841049. The next prime is 20841089. The reversal of 20841081 is 18014802.

It is not a de Polignac number, because 20841081 - 2⁵ = 20841049 is a prime.

It is a super-2 number, since 2×20841081² = 868701314497122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20841089) 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, 5800 + ... + 8678.

It is an arithmetic number, because the mean of its divisors is an integer number (1843200).

Almost surely, 2^20841081 is an apocalyptic number.

It is an amenable number.

20841081 is a deficient number, since it is larger than the sum of its proper divisors (8650119).

20841081 is a wasteful number, since it uses less digits than its factorization.

20841081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3028.

The product of its (nonzero) digits is 512, while the sum is 24.

The square root of 20841081 is about 4565.2032813447. The cubic root of 20841081 is about 275.1947094893.

Adding to 20841081 its reverse (18014802), we get a palindrome (38855883).

The spelling of 20841081 in words is "twenty million, eight hundred forty-one thousand, eighty-one".