20958043 has 2 divisors, whose sum is σ = 20958044. Its totient is φ = 20958042.

The previous prime is 20958029. The next prime is 20958053. The reversal of 20958043 is 34085902.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20958043 is a prime.

It is equal to p_1327459 and since 20958043 and 1327459 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 20957996 and 20958014.

It is not a weakly prime, because it can be changed into another prime (20958013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10479021 + 10479022.

It is an arithmetic number, because the mean of its divisors is an integer number (10479022).

Almost surely, 2^20958043 is an apocalyptic number.

20958043 is a deficient number, since it is larger than the sum of its proper divisors (1).

20958043 is an equidigital number, since it uses as much as digits as its factorization.

20958043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 20958043 is about 4577.9955220598. The cubic root of 20958043 is about 275.7085551633.

The spelling of 20958043 in words is "twenty million, nine hundred fifty-eight thousand, forty-three".