18953268 has 12 divisors (see below), whose sum is σ = 44224320. Its totient is φ = 6317752.

The previous prime is 18953257. The next prime is 18953281. The reversal of 18953268 is 86235981.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 789708 + ... + 789731.

It is an arithmetic number, because the mean of its divisors is an integer number (3685360).

Almost surely, 2^18953268 is an apocalyptic number.

It is an amenable number.

18953268 is an abundant number, since it is smaller than the sum of its proper divisors (25271052).

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

18953268 is a wasteful number, since it uses less digits than its factorization.

18953268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1579446 (or 1579444 counting only the distinct ones).

The product of its digits is 103680, while the sum is 42.

The square root of 18953268 is about 4353.5351152828. The cubic root of 18953268 is about 266.6212137808.

The spelling of 18953268 in words is "eighteen million, nine hundred fifty-three thousand, two hundred sixty-eight".