18550071 has 12 divisors (see below), whose sum is σ = 27418248. Its totient is φ = 12078864.

The previous prime is 18550067. The next prime is 18550079. The reversal of 18550071 is 17005581.

It is not a de Polignac number, because 18550071 - 2² = 18550067 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18550079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23580 + ... + 24353.

It is an arithmetic number, because the mean of its divisors is an integer number (2284854).

Almost surely, 2^18550071 is an apocalyptic number.

18550071 is a deficient number, since it is larger than the sum of its proper divisors (8868177).

18550071 is a wasteful number, since it uses less digits than its factorization.

18550071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47982 (or 47979 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 27.

The square root of 18550071 is about 4306.9793359151. The cubic root of 18550071 is about 264.7170160633.

The spelling of 18550071 in words is "eighteen million, five hundred fifty thousand, seventy-one".