18837522 has 90 divisors (see below), whose sum is σ = 47941047. Its totient is φ = 5524200.

The previous prime is 18837521. The next prime is 18837523. The reversal of 18837522 is 22573881.

It is an interprime number because it is at equal distance from previous prime (18837521) and next prime (18837523).

It can be written as a sum of positive squares in only one way, i.e., 9418761 + 9418761 = 3069^2 + 3069^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=3069.

It is not an unprimeable number, because it can be changed into a prime (18837521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 607647 + ... + 607677.

Almost surely, 2^18837522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18837522

18837522 is an abundant number, since it is smaller than the sum of its proper divisors (29103525).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18837522 is a wasteful number, since it uses less digits than its factorization.

18837522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98 (or 47 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 18837522 is about 4340.2214229230. The cubic root of 18837522 is about 266.0773608069.

The spelling of 18837522 in words is "eighteen million, eight hundred thirty-seven thousand, five hundred twenty-two".