18073620 has 144 divisors (see below), whose sum is σ = 58705920. Its totient is φ = 4492800.

The previous prime is 18073619. The next prime is 18073637. The reversal of 18073620 is 2637081.

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, 228741 + ... + 228819.

It is an arithmetic number, because the mean of its divisors is an integer number (407680).

Almost surely, 2^18073620 is an apocalyptic number.

18073620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18073620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29352960).

18073620 is an abundant number, since it is smaller than the sum of its proper divisors (40632300).

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

18073620 is a wasteful number, since it uses less digits than its factorization.

18073620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166 (or 161 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 18073620 is about 4251.3080340055. The cubic root of 18073620 is about 262.4309478234.

The spelling of 18073620 in words is "eighteen million, seventy-three thousand, six hundred twenty".