18536071 has 4 divisors (see below), whose sum is σ = 18550144. Its totient is φ = 18522000.

The previous prime is 18536057. The next prime is 18536081. The reversal of 18536071 is 17063581.

It is a semiprime because it is the product of two primes.

It is a 4-Lehmer number, since φ(18536071) divides (18536071-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 18536071 - 2⁷ = 18535943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18536081) 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 3 ways as a sum of consecutive naturals, for example, 4830 + ... + 7771.

It is an arithmetic number, because the mean of its divisors is an integer number (4637536).

Almost surely, 2^18536071 is an apocalyptic number.

18536071 is a deficient number, since it is larger than the sum of its proper divisors (14073).

18536071 is a wasteful number, since it uses less digits than its factorization.

18536071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14072.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 18536071 is about 4305.3537601456. The cubic root of 18536071 is about 264.6504040820.

The spelling of 18536071 in words is "eighteen million, five hundred thirty-six thousand, seventy-one".