18001725 has 48 divisors (see below), whose sum is σ = 36033408. Its totient is φ = 7741440.

The previous prime is 18001723. The next prime is 18001729. The reversal of 18001725 is 52710081.

It is not a de Polignac number, because 18001725 - 2¹ = 18001723 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18001695 and 18001704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18001723) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7917 + ... + 9933.

It is an arithmetic number, because the mean of its divisors is an integer number (750696).

Almost surely, 2^18001725 is an apocalyptic number.

18001725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18001725 is an abundant number, since it is smaller than the sum of its proper divisors (18031683).

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

18001725 is a wasteful number, since it uses less digits than its factorization.

18001725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2054 (or 2049 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 24.

The square root of 18001725 is about 4242.8439754485. The cubic root of 18001725 is about 262.0825109663.

The spelling of 18001725 in words is "eighteen million, one thousand, seven hundred twenty-five".