18985522 has 16 divisors (see below), whose sum is σ = 30428640. Its totient is φ = 8857728.

The previous prime is 18985513. The next prime is 18985529. The reversal of 18985522 is 22558981.

It is a super-2 number, since 2×18985522² = 720900091224968, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 1183 + ... + 6274.

It is an arithmetic number, because the mean of its divisors is an integer number (1901790).

Almost surely, 2^18985522 is an apocalyptic number.

18985522 is a deficient number, since it is larger than the sum of its proper divisors (11443118).

18985522 is a wasteful number, since it uses less digits than its factorization.

18985522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7545.

The product of its digits is 57600, while the sum is 40.

The square root of 18985522 is about 4357.2378865515. The cubic root of 18985522 is about 266.7723702476.

The spelling of 18985522 in words is "eighteen million, nine hundred eighty-five thousand, five hundred twenty-two".