20683081 has 8 divisors (see below), whose sum is σ = 21052224. Its totient is φ = 20316240.

The previous prime is 20683063. The next prime is 20683123. The reversal of 20683081 is 18038602.

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 20683081 - 2⁷ = 20682953 is a prime.

It is a super-2 number, since 2×20683081² = 855579679305122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20683021) 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, 36855 + ... + 37411.

It is an arithmetic number, because the mean of its divisors is an integer number (2631528).

Almost surely, 2^20683081 is an apocalyptic number.

It is an amenable number.

20683081 is a deficient number, since it is larger than the sum of its proper divisors (369143).

20683081 is an equidigital number, since it uses as much as digits as its factorization.

20683081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 20683081 is about 4547.8655433071. The cubic root of 20683081 is about 274.4975110452.

The spelling of 20683081 in words is "twenty million, six hundred eighty-three thousand, eighty-one".