18697448 has 64 divisors (see below), whose sum is σ = 44236800. Its totient is φ = 7197120.

The previous prime is 18697447. The next prime is 18697451. The reversal of 18697448 is 84479681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18697447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78113 + ... + 78351.

It is an arithmetic number, because the mean of its divisors is an integer number (691200).

Almost surely, 2^18697448 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18697448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22118400).

18697448 is an abundant number, since it is smaller than the sum of its proper divisors (25539352).

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

18697448 is a wasteful number, since it uses less digits than its factorization.

18697448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390 (or 386 counting only the distinct ones).

The product of its digits is 387072, while the sum is 47.

The square root of 18697448 is about 4324.0545787490. The cubic root of 18697448 is about 265.4162107935.

The spelling of 18697448 in words is "eighteen million, six hundred ninety-seven thousand, four hundred forty-eight".