18061330 has 16 divisors (see below), whose sum is σ = 37154880. Its totient is φ = 6192432.

The previous prime is 18061319. The next prime is 18061331. The reversal of 18061330 is 3316081.

It is not an unprimeable number, because it can be changed into a prime (18061331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128940 + ... + 129079.

It is an arithmetic number, because the mean of its divisors is an integer number (2322180).

Almost surely, 2^18061330 is an apocalyptic number.

18061330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18061330 is an abundant number, since it is smaller than the sum of its proper divisors (19093550).

18061330 is a wasteful number, since it uses less digits than its factorization.

18061330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258033.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 18061330 is about 4249.8623507121. The cubic root of 18061330 is about 262.3714502853.

It can be divided in two parts, 1806 and 1330, that added together give a square (3136 = 56²).

The spelling of 18061330 in words is "eighteen million, sixty-one thousand, three hundred thirty".