20081361 has 8 divisors (see below), whose sum is σ = 27345024. Its totient is φ = 13102640.

The previous prime is 20081357. The next prime is 20081363. The reversal of 20081361 is 16318002.

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 20081361 - 2² = 20081357 is a prime.

It is a super-2 number, since 2×20081361² = 806522119224642, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20081363) 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, 71070 + ... + 71351.

It is an arithmetic number, because the mean of its divisors is an integer number (3418128).

Almost surely, 2^20081361 is an apocalyptic number.

It is an amenable number.

20081361 is a deficient number, since it is larger than the sum of its proper divisors (7263663).

20081361 is a wasteful number, since it uses less digits than its factorization.

20081361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142471.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 20081361 is about 4481.2231589154. The cubic root of 20081361 is about 271.8093432153.

Adding to 20081361 its reverse (16318002), we get a palindrome (36399363).

The spelling of 20081361 in words is "twenty million, eighty-one thousand, three hundred sixty-one".