18059550 has 24 divisors (see below), whose sum is σ = 44788056. Its totient is φ = 4815840.

The previous prime is 18059539. The next prime is 18059551. The reversal of 18059550 is 5595081.

It is a super-2 number, since 2×18059550² = 652294692405000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18059551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60049 + ... + 60348.

It is an arithmetic number, because the mean of its divisors is an integer number (1866169).

Almost surely, 2^18059550 is an apocalyptic number.

18059550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18059550 is an abundant number, since it is smaller than the sum of its proper divisors (26728506).

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

18059550 is a wasteful number, since it uses less digits than its factorization.

18059550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120412 (or 120407 counting only the distinct ones).

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

The square root of 18059550 is about 4249.6529270047. The cubic root of 18059550 is about 262.3628308292.

The spelling of 18059550 in words is "eighteen million, fifty-nine thousand, five hundred fifty".