18025420 has 48 divisors (see below), whose sum is σ = 43545600. Its totient is φ = 6139584.

The previous prime is 18025417. The next prime is 18025429. The reversal of 18025420 is 2452081.

It is a junction number, because it is equal to n+sod(n) for n = 18025391 and 18025400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18025429) 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 15 ways as a sum of consecutive naturals, for example, 27537 + ... + 28183.

It is an arithmetic number, because the mean of its divisors is an integer number (907200).

Almost surely, 2^18025420 is an apocalyptic number.

18025420 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 18025420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21772800).

18025420 is an abundant number, since it is smaller than the sum of its proper divisors (25520180).

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

18025420 is a wasteful number, since it uses less digits than its factorization.

18025420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 862 (or 860 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 18025420 is about 4245.6354059198. The cubic root of 18025420 is about 262.1974503661.

It can be divided in two parts, 180 and 25420, that added together give a square (25600 = 160²).

The spelling of 18025420 in words is "eighteen million, twenty-five thousand, four hundred twenty".