18868571 has 4 divisors (see below), whose sum is σ = 18920352. Its totient is φ = 18816792.

The previous prime is 18868559. The next prime is 18868601. The reversal of 18868571 is 17586881.

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

It is a cyclic number.

It is not a de Polignac number, because 18868571 - 2¹⁰ = 18867547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18868511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25340 + ... + 26073.

It is an arithmetic number, because the mean of its divisors is an integer number (4730088).

Almost surely, 2^18868571 is an apocalyptic number.

18868571 is a deficient number, since it is larger than the sum of its proper divisors (51781).

18868571 is an equidigital number, since it uses as much as digits as its factorization.

18868571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51780.

The product of its digits is 107520, while the sum is 44.

The square root of 18868571 is about 4343.7968414741. The cubic root of 18868571 is about 266.2234681549.

The spelling of 18868571 in words is "eighteen million, eight hundred sixty-eight thousand, five hundred seventy-one".