18004425 has 12 divisors (see below), whose sum is σ = 29767440. Its totient is φ = 9602320.

The previous prime is 18004417. The next prime is 18004463. The reversal of 18004425 is 52440081.

It is not a de Polignac number, because 18004425 - 2³ = 18004417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18004395 and 18004404.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 119955 + ... + 120104.

It is an arithmetic number, because the mean of its divisors is an integer number (2480620).

Almost surely, 2^18004425 is an apocalyptic number.

18004425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18004425 is a deficient number, since it is larger than the sum of its proper divisors (11763015).

18004425 is a wasteful number, since it uses less digits than its factorization.

18004425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240072 (or 240067 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 18004425 is about 4243.1621463244. The cubic root of 18004425 is about 262.0956131811.

The spelling of 18004425 in words is "eighteen million, four thousand, four hundred twenty-five".