18075420 has 192 divisors, whose sum is σ = 65318400. Its totient is φ = 4101120.

The previous prime is 18075413. The next prime is 18075427. The reversal of 18075420 is 2457081.

It is an interprime number because it is at equal distance from previous prime (18075413) and next prime (18075427).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18075427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 100891 + ... + 101069.

It is an arithmetic number, because the mean of its divisors is an integer number (340200).

Almost surely, 2^18075420 is an apocalyptic number.

18075420 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 18075420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32659200).

18075420 is an abundant number, since it is smaller than the sum of its proper divisors (47242980).

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

18075420 is a wasteful number, since it uses less digits than its factorization.

18075420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225 (or 217 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 18075420 is about 4251.5197282854. The cubic root of 18075420 is about 262.4396596001.

It can be divided in two parts, 1807 and 5420, that added together give a palindrome (7227).

The spelling of 18075420 in words is "eighteen million, seventy-five thousand, four hundred twenty".