18418950 has 108 divisors (see below), whose sum is σ = 54883764. Its totient is φ = 4392000.

The previous prime is 18418943. The next prime is 18418951. The reversal of 18418950 is 5981481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18418951) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 301920 + ... + 301980.

It is an arithmetic number, because the mean of its divisors is an integer number (508183).

Almost surely, 2^18418950 is an apocalyptic number.

18418950 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 18418950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27441882).

18418950 is an abundant number, since it is smaller than the sum of its proper divisors (36464814).

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

18418950 is a wasteful number, since it uses less digits than its factorization.

18418950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151 (or 82 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 18418950 is about 4291.7304202384. The cubic root of 18418950 is about 264.0918241188.

The spelling of 18418950 in words is "eighteen million, four hundred eighteen thousand, nine hundred fifty".