18985527 has 12 divisors (see below), whose sum is σ = 29916744. Its totient is φ = 11506320.

The previous prime is 18985513. The next prime is 18985529. The reversal of 18985527 is 72558981.

It is a happy number.

18985527 is a `hidden beast` number, since 1 + 8 + 98 + 552 + 7 = 666.

It is not a de Polignac number, because 18985527 - 2¹⁹ = 18461239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18985529) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95788 + ... + 95985.

It is an arithmetic number, because the mean of its divisors is an integer number (2493062).

Almost surely, 2^18985527 is an apocalyptic number.

18985527 is a deficient number, since it is larger than the sum of its proper divisors (10931217).

18985527 is a wasteful number, since it uses less digits than its factorization.

18985527 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191790 (or 191787 counting only the distinct ones).

The product of its digits is 201600, while the sum is 45.

The square root of 18985527 is about 4357.2384603095. The cubic root of 18985527 is about 266.7723936665.

The spelling of 18985527 in words is "eighteen million, nine hundred eighty-five thousand, five hundred twenty-seven".