18897936 has 40 divisors (see below), whose sum is σ = 49654560. Its totient is φ = 6191616.

The previous prime is 18897919. The next prime is 18897943. The reversal of 18897936 is 63979881.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 505 + ... + 6168.

It is an arithmetic number, because the mean of its divisors is an integer number (1241364).

Almost surely, 2^18897936 is an apocalyptic number.

18897936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18897936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24827280).

18897936 is an abundant number, since it is smaller than the sum of its proper divisors (30756624).

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

18897936 is a wasteful number, since it uses less digits than its factorization.

18897936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6743 (or 6737 counting only the distinct ones).

The product of its digits is 653184, while the sum is 51.

The square root of 18897936 is about 4347.1756348231. The cubic root of 18897936 is about 266.3615036943.

The spelling of 18897936 in words is "eighteen million, eight hundred ninety-seven thousand, nine hundred thirty-six".