18245871 has 32 divisors (see below), whose sum is σ = 32524800. Its totient is φ = 9875520.

The previous prime is 18245867. The next prime is 18245881. The reversal of 18245871 is 17854281.

It is not a de Polignac number, because 18245871 - 2² = 18245867 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18245881) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1051 + ... + 6131.

It is an arithmetic number, because the mean of its divisors is an integer number (1016400).

Almost surely, 2^18245871 is an apocalyptic number.

18245871 is a deficient number, since it is larger than the sum of its proper divisors (14278929).

18245871 is a wasteful number, since it uses less digits than its factorization.

18245871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5116 (or 5110 counting only the distinct ones).

The product of its digits is 17920, while the sum is 36.

The square root of 18245871 is about 4271.5185824248. The cubic root of 18245871 is about 263.2620143704.

The spelling of 18245871 in words is "eighteen million, two hundred forty-five thousand, eight hundred seventy-one".