20983141 has 2 divisors, whose sum is σ = 20983142. Its totient is φ = 20983140.

The previous prime is 20983139. The next prime is 20983159. The reversal of 20983141 is 14138902.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14092516 + 6890625 = 3754^2 + 2625^2 .

It is a cyclic number.

It is not a de Polignac number, because 20983141 - 2¹ = 20983139 is a prime.

It is a super-3 number, since 3×20983141³ (a number of 23 digits) contains 333 as substring.

Together with 20983139, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20983121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10491570 + 10491571.

It is an arithmetic number, because the mean of its divisors is an integer number (10491571).

Almost surely, 2^20983141 is an apocalyptic number.

It is an amenable number.

20983141 is a deficient number, since it is larger than the sum of its proper divisors (1).

20983141 is an equidigital number, since it uses as much as digits as its factorization.

20983141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 20983141 is about 4580.7358579163. The cubic root of 20983141 is about 275.8185681854.

The spelling of 20983141 in words is "twenty million, nine hundred eighty-three thousand, one hundred forty-one".