18812071 has 18 divisors (see below), whose sum is σ = 21006816. Its totient is φ = 16826400.

The previous prime is 18812069. The next prime is 18812077. The reversal of 18812071 is 17021881.

It is not a de Polignac number, because 18812071 - 2¹ = 18812069 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 (18812077) 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 17 ways as a sum of consecutive naturals, for example, 458811 + ... + 458851.

Almost surely, 2^18812071 is an apocalyptic number.

18812071 is a deficient number, since it is larger than the sum of its proper divisors (2194745).

18812071 is an equidigital number, since it uses as much as digits as its factorization.

18812071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151 (or 91 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 28.

The square root of 18812071 is about 4337.2884386446. The cubic root of 18812071 is about 265.9574761955.

It can be divided in two parts, 188120 and 71, that added together give a triangular number (188191 = T₆₁₃).

The spelling of 18812071 in words is "eighteen million, eight hundred twelve thousand, seventy-one".