20892143 has 2 divisors, whose sum is σ = 20892144. Its totient is φ = 20892142.

The previous prime is 20892121. The next prime is 20892149. The reversal of 20892143 is 34129802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20892143 - 2¹⁴ = 20875759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20892149) 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, 10446071 + 10446072.

It is an arithmetic number, because the mean of its divisors is an integer number (10446072).

Almost surely, 2^20892143 is an apocalyptic number.

20892143 is a deficient number, since it is larger than the sum of its proper divisors (1).

20892143 is an equidigital number, since it uses as much as digits as its factorization.

20892143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 20892143 is about 4570.7923820712. The cubic root of 20892143 is about 275.4192744844.

The spelling of 20892143 in words is "twenty million, eight hundred ninety-two thousand, one hundred forty-three".