18968550 has 24 divisors (see below), whose sum is σ = 47042376. Its totient is φ = 5058240.

The previous prime is 18968513. The next prime is 18968561. The reversal of 18968550 is 5586981.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63079 + ... + 63378.

It is an arithmetic number, because the mean of its divisors is an integer number (1960099).

Almost surely, 2^18968550 is an apocalyptic number.

18968550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18968550 is an abundant number, since it is smaller than the sum of its proper divisors (28073826).

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

18968550 is a wasteful number, since it uses less digits than its factorization.

18968550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126472 (or 126467 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 42.

The square root of 18968550 is about 4355.2898870224. The cubic root of 18968550 is about 266.6928533312.

The spelling of 18968550 in words is "eighteen million, nine hundred sixty-eight thousand, five hundred fifty".