18106925 has 6 divisors (see below), whose sum is σ = 22452618. Its totient is φ = 14485520.

The previous prime is 18106909. The next prime is 18106939. The reversal of 18106925 is 52960181.

It can be written as a sum of positive squares in 3 ways, for example, as 1247689 + 16859236 = 1117^2 + 4106^2 .

It is not a de Polignac number, because 18106925 - 2⁴ = 18106909 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18106891 and 18106900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 362114 + ... + 362163.

It is an arithmetic number, because the mean of its divisors is an integer number (3742103).

Almost surely, 2^18106925 is an apocalyptic number.

It is an amenable number.

18106925 is a deficient number, since it is larger than the sum of its proper divisors (4345693).

18106925 is an equidigital number, since it uses as much as digits as its factorization.

18106925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724287 (or 724282 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 18106925 is about 4255.2232608877. The cubic root of 18106925 is about 262.5920463292.

The spelling of 18106925 in words is "eighteen million, one hundred six thousand, nine hundred twenty-five".