18989548 has 24 divisors (see below), whose sum is σ = 34675200. Its totient is φ = 9088128.

The previous prime is 18989543. The next prime is 18989567. The reversal of 18989548 is 84598981.

It is a junction number, because it is equal to n+sod(n) for n = 18989495 and 18989504.

It is not an unprimeable number, because it can be changed into a prime (18989543) 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 7 ways as a sum of consecutive naturals, for example, 14088 + ... + 15376.

It is an arithmetic number, because the mean of its divisors is an integer number (1444800).

Almost surely, 2^18989548 is an apocalyptic number.

It is an amenable number.

18989548 is a deficient number, since it is larger than the sum of its proper divisors (15685652).

18989548 is a wasteful number, since it uses less digits than its factorization.

18989548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1449 (or 1447 counting only the distinct ones).

The product of its digits is 829440, while the sum is 52.

The square root of 18989548 is about 4357.6998519861. The cubic root of 18989548 is about 266.7912258375.

The spelling of 18989548 in words is "eighteen million, nine hundred eighty-nine thousand, five hundred forty-eight".