18093620 has 12 divisors (see below), whose sum is σ = 37996644. Its totient is φ = 7237440.

The previous prime is 18093613. The next prime is 18093623. The reversal of 18093620 is 2639081.

It can be written as a sum of positive squares in 2 ways, for example, as 9461776 + 8631844 = 3076^2 + 2938^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18093623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 452321 + ... + 452360.

It is an arithmetic number, because the mean of its divisors is an integer number (3166387).

Almost surely, 2^18093620 is an apocalyptic number.

18093620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18093620 is an abundant number, since it is smaller than the sum of its proper divisors (19903024).

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

18093620 is a wasteful number, since it uses less digits than its factorization.

18093620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 904690 (or 904688 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 18093620 is about 4253.6596008614. The cubic root of 18093620 is about 262.5277128716.

The spelling of 18093620 in words is "eighteen million, ninety-three thousand, six hundred twenty".