18689148 has 36 divisors (see below), whose sum is σ = 47469240. Its totient is φ = 6199776.

The previous prime is 18689131. The next prime is 18689149. The reversal of 18689148 is 84198681.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18689149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7111 + ... + 9377.

It is an arithmetic number, because the mean of its divisors is an integer number (1318590).

Almost surely, 2^18689148 is an apocalyptic number.

18689148 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18689148 is an abundant number, since it is smaller than the sum of its proper divisors (28780092).

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

18689148 is a wasteful number, since it uses less digits than its factorization.

18689148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2506 (or 2501 counting only the distinct ones).

The product of its digits is 110592, while the sum is 45.

The square root of 18689148 is about 4323.0947248470. The cubic root of 18689148 is about 265.3769312690.

The spelling of 18689148 in words is "eighteen million, six hundred eighty-nine thousand, one hundred forty-eight".