19922143 has 2 divisors, whose sum is σ = 19922144. Its totient is φ = 19922142.

The previous prime is 19922131. The next prime is 19922167. The reversal of 19922143 is 34122991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19922143 - 2⁹ = 19921631 is a prime.

It is equal to p_1265962 and since 19922143 and 1265962 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19922443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9961071 + 9961072.

It is an arithmetic number, because the mean of its divisors is an integer number (9961072).

Almost surely, 2^19922143 is an apocalyptic number.

19922143 is a deficient number, since it is larger than the sum of its proper divisors (1).

19922143 is an equidigital number, since it uses as much as digits as its factorization.

19922143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 31.

The square root of 19922143 is about 4463.4227897433. The cubic root of 19922143 is about 271.0890762584.

The spelling of 19922143 in words is "nineteen million, nine hundred twenty-two thousand, one hundred forty-three".