18505625 has 20 divisors (see below), whose sum is σ = 23945460. Its totient is φ = 14280000.

The previous prime is 18505603. The next prime is 18505633. The reversal of 18505625 is 52650581.

It can be written as a sum of positive squares in 10 ways, for example, as 13366336 + 5139289 = 3656^2 + 2267^2 .

It is not a de Polignac number, because 18505625 - 2⁶ = 18505561 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18505591 and 18505600.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 17615 + ... + 18635.

It is an arithmetic number, because the mean of its divisors is an integer number (1197273).

Almost surely, 2^18505625 is an apocalyptic number.

It is an amenable number.

18505625 is a deficient number, since it is larger than the sum of its proper divisors (5439835).

18505625 is an equidigital number, since it uses as much as digits as its factorization.

18505625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1070 (or 1055 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 32.

The square root of 18505625 is about 4301.8164767921. The cubic root of 18505625 is about 264.5054261843.

The spelling of 18505625 in words is "eighteen million, five hundred five thousand, six hundred twenty-five".