19934143 has 2 divisors, whose sum is σ = 19934144. Its totient is φ = 19934142.

The previous prime is 19934137. The next prime is 19934171. The reversal of 19934143 is 34143991.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19934143 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19934099 and 19934108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19934113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9967071 + 9967072.

It is an arithmetic number, because the mean of its divisors is an integer number (9967072).

Almost surely, 2^19934143 is an apocalyptic number.

19934143 is a deficient number, since it is larger than the sum of its proper divisors (1).

19934143 is an equidigital number, since it uses as much as digits as its factorization.

19934143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 34.

The square root of 19934143 is about 4464.7668472161. The cubic root of 19934143 is about 271.1434950355.

The spelling of 19934143 in words is "nineteen million, nine hundred thirty-four thousand, one hundred forty-three".