18055950 has 96 divisors (see below), whose sum is σ = 50568192. Its totient is φ = 4224000.

The previous prime is 18055927. The next prime is 18055993. The reversal of 18055950 is 5955081.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 50974 + ... + 51326.

It is an arithmetic number, because the mean of its divisors is an integer number (526752).

Almost surely, 2^18055950 is an apocalyptic number.

18055950 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 18055950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25284096).

18055950 is an abundant number, since it is smaller than the sum of its proper divisors (32512242).

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

18055950 is a wasteful number, since it uses less digits than its factorization.

18055950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410 (or 405 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 33.

The square root of 18055950 is about 4249.2293418925. The cubic root of 18055950 is about 262.3453964900.

The spelling of 18055950 in words is "eighteen million, fifty-five thousand, nine hundred fifty".