20081081 has 8 divisors (see below), whose sum is σ = 21242400. Its totient is φ = 18930240.

The previous prime is 20081077. The next prime is 20081107. The reversal of 20081081 is 18018002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20081081 - 2² = 20081077 is a prime.

It is a super-2 number, since 2×20081081² = 806499628257122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20081041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1505 + ... + 6513.

It is an arithmetic number, because the mean of its divisors is an integer number (2655300).

Almost surely, 2^20081081 is an apocalyptic number.

It is an amenable number.

20081081 is a deficient number, since it is larger than the sum of its proper divisors (1161319).

20081081 is a wasteful number, since it uses less digits than its factorization.

20081081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5239.

The product of its (nonzero) digits is 128, while the sum is 20.

The square root of 20081081 is about 4481.1919173363. The cubic root of 20081081 is about 271.8080799050.

Adding to 20081081 its reverse (18018002), we get a palindrome (38099083).

The spelling of 20081081 in words is "twenty million, eighty-one thousand, eighty-one".