18734143 has 2 divisors, whose sum is σ = 18734144. Its totient is φ = 18734142.

The previous prime is 18734141. The next prime is 18734147. The reversal of 18734143 is 34143781.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18734143 - 2¹ = 18734141 is a prime.

It is a super-2 number, since 2×18734143² = 701936227888898, which contains 22 as substring.

Together with 18734141, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18734141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9367071 + 9367072.

It is an arithmetic number, because the mean of its divisors is an integer number (9367072).

Almost surely, 2^18734143 is an apocalyptic number.

18734143 is a deficient number, since it is larger than the sum of its proper divisors (1).

18734143 is an equidigital number, since it uses as much as digits as its factorization.

18734143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 31.

The square root of 18734143 is about 4328.2956229906. The cubic root of 18734143 is about 265.5897297206.

The spelling of 18734143 in words is "eighteen million, seven hundred thirty-four thousand, one hundred forty-three".