18874143 has 12 divisors (see below), whose sum is σ = 27647568. Its totient is φ = 12405120.

The previous prime is 18874111. The next prime is 18874147. The reversal of 18874143 is 34147881.

It is not a de Polignac number, because 18874143 - 2⁵ = 18874111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18874098 and 18874107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18874147) 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 in 11 ways as a sum of consecutive naturals, for example, 14130 + ... + 15407.

It is an arithmetic number, because the mean of its divisors is an integer number (2303964).

Almost surely, 2^18874143 is an apocalyptic number.

18874143 is a deficient number, since it is larger than the sum of its proper divisors (8773425).

18874143 is a wasteful number, since it uses less digits than its factorization.

18874143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29614 (or 29611 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 18874143 is about 4344.4381685092. The cubic root of 18874143 is about 266.2496713611.

The spelling of 18874143 in words is "eighteen million, eight hundred seventy-four thousand, one hundred forty-three".