18025980 has 96 divisors (see below), whose sum is σ = 58254336. Its totient is φ = 4079616.

The previous prime is 18025961. The next prime is 18025991. The reversal of 18025980 is 8952081.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 70012 + ... + 70268.

It is an arithmetic number, because the mean of its divisors is an integer number (606816).

Almost surely, 2^18025980 is an apocalyptic number.

18025980 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 18025980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29127168).

18025980 is an abundant number, since it is smaller than the sum of its proper divisors (40228356).

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

18025980 is a wasteful number, since it uses less digits than its factorization.

18025980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443 (or 441 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 18025980 is about 4245.7013554889. The cubic root of 18025980 is about 262.2001655881.

The spelling of 18025980 in words is "eighteen million, twenty-five thousand, nine hundred eighty".