18949888 has 36 divisors (see below), whose sum is σ = 38345440. Its totient is φ = 9345024.

The previous prime is 18949877. The next prime is 18949949. The reversal of 18949888 is 88894981.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 19756 + ... + 20692.

Almost surely, 2^18949888 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 18949888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19172720).

18949888 is an abundant number, since it is smaller than the sum of its proper divisors (19395552).

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

18949888 is an frugal number, since it uses more digits than its factorization.

18949888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1032 (or 1018 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 55.

The square root of 18949888 is about 4353.1469076979. The cubic root of 18949888 is about 266.6053636861.

The spelling of 18949888 in words is "eighteen million, nine hundred forty-nine thousand, eight hundred eighty-eight".