20003081 has 8 divisors (see below), whose sum is σ = 22951680. Its totient is φ = 17077248.

The previous prime is 20003063. The next prime is 20003089. The reversal of 20003081 is 18030002.

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 20003081 - 2¹⁸ = 19740937 is a prime.

It is a super-2 number, since 2×20003081² = 800246498985122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20003089) 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, 3761 + ... + 7358.

It is an arithmetic number, because the mean of its divisors is an integer number (2868960).

Almost surely, 2^20003081 is an apocalyptic number.

It is an amenable number.

20003081 is a deficient number, since it is larger than the sum of its proper divisors (2948599).

20003081 is a wasteful number, since it uses less digits than its factorization.

20003081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11383.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 20003081 is about 4472.4804080063. The cubic root of 20003081 is about 271.4556994783.

Adding to 20003081 its reverse (18030002), we get a palindrome (38033083).

The spelling of 20003081 in words is "twenty million, three thousand, eighty-one".