20081135 has 8 divisors (see below), whose sum is σ = 24128496. Its totient is φ = 16044160.

The previous prime is 20081107. The next prime is 20081153. The reversal of 20081135 is 53118002.

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

It is a de Polignac number, because none of the positive numbers 2^k-20081135 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2615 + ... + 6855.

It is an arithmetic number, because the mean of its divisors is an integer number (3016062).

Almost surely, 2^20081135 is an apocalyptic number.

20081135 is a deficient number, since it is larger than the sum of its proper divisors (4047361).

20081135 is an equidigital number, since it uses as much as digits as its factorization.

20081135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5193.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 20081135 is about 4481.1979425149. The cubic root of 20081135 is about 271.8083235443.

Adding to 20081135 its reverse (53118002), we get a palindrome (73199137).

The spelling of 20081135 in words is "twenty million, eighty-one thousand, one hundred thirty-five".