20833961 has 2 divisors, whose sum is σ = 20833962. Its totient is φ = 20833960.

The previous prime is 20833957. The next prime is 20833963. The reversal of 20833961 is 16933802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18490000 + 2343961 = 4300^2 + 1531^2 .

It is a cyclic number.

It is not a de Polignac number, because 20833961 - 2² = 20833957 is a prime.

Together with 20833963, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20833963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10416980 + 10416981.

It is an arithmetic number, because the mean of its divisors is an integer number (10416981).

Almost surely, 2^20833961 is an apocalyptic number.

It is an amenable number.

20833961 is a deficient number, since it is larger than the sum of its proper divisors (1).

20833961 is an equidigital number, since it uses as much as digits as its factorization.

20833961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 20833961 is about 4564.4234027969. The cubic root of 20833961 is about 275.1633673930.

The spelling of 20833961 in words is "twenty million, eight hundred thirty-three thousand, nine hundred sixty-one".