20211943 has 2 divisors, whose sum is σ = 20211944. Its totient is φ = 20211942.

The previous prime is 20211937. The next prime is 20211949. The reversal of 20211943 is 34911202.

It is a balanced prime because it is at equal distance from previous prime (20211937) and next prime (20211949).

It is a cyclic number.

It is not a de Polignac number, because 20211943 - 2¹³ = 20203751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20211949) 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 as a sum of consecutive naturals, namely, 10105971 + 10105972.

It is an arithmetic number, because the mean of its divisors is an integer number (10105972).

Almost surely, 2^20211943 is an apocalyptic number.

20211943 is a deficient number, since it is larger than the sum of its proper divisors (1).

20211943 is an equidigital number, since it uses as much as digits as its factorization.

20211943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 20211943 is about 4495.7694558329. The cubic root of 20211943 is about 272.3972308372.

The spelling of 20211943 in words is "twenty million, two hundred eleven thousand, nine hundred forty-three".