18505350 has 144 divisors (see below), whose sum is σ = 54840240. Its totient is φ = 4454400.

The previous prime is 18505307. The next prime is 18505381. The reversal of 18505350 is 5350581.

18505350 is nontrivially palindromic in base 7.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 313621 + ... + 313679.

It is an arithmetic number, because the mean of its divisors is an integer number (380835).

Almost surely, 2^18505350 is an apocalyptic number.

18505350 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18505350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27420120).

18505350 is an abundant number, since it is smaller than the sum of its proper divisors (36334890).

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

18505350 is a wasteful number, since it uses less digits than its factorization.

18505350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 18505350 is about 4301.7845134316. The cubic root of 18505350 is about 264.5041159637.

The spelling of 18505350 in words is "eighteen million, five hundred five thousand, three hundred fifty".