18955312 has 40 divisors (see below), whose sum is σ = 40354560. Its totient is φ = 8585280.

The previous prime is 18955301. The next prime is 18955327. The reversal of 18955312 is 21355981.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5637 + ... + 8347.

It is an arithmetic number, because the mean of its divisors is an integer number (1008864).

Almost surely, 2^18955312 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 18955312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20177280).

18955312 is an abundant number, since it is smaller than the sum of its proper divisors (21399248).

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

18955312 is a wasteful number, since it uses less digits than its factorization.

18955312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2761 (or 2755 counting only the distinct ones).

The product of its digits is 10800, while the sum is 34.

The square root of 18955312 is about 4353.7698607069. The cubic root of 18955312 is about 266.6307979534.

The spelling of 18955312 in words is "eighteen million, nine hundred fifty-five thousand, three hundred twelve".