18701425 has 6 divisors (see below), whose sum is σ = 23189798. Its totient is φ = 14961120.

The previous prime is 18701413. The next prime is 18701467. The reversal of 18701425 is 52410781.

It can be written as a sum of positive squares in 3 ways, for example, as 3154176 + 15547249 = 1776^2 + 3943^2 .

It is not a de Polignac number, because 18701425 - 2⁷ = 18701297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18701393 and 18701402.

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 5 ways as a sum of consecutive naturals, for example, 374004 + ... + 374053.

Almost surely, 2^18701425 is an apocalyptic number.

It is an amenable number.

18701425 is a deficient number, since it is larger than the sum of its proper divisors (4488373).

18701425 is an equidigital number, since it uses as much as digits as its factorization.

18701425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 748067 (or 748062 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 18701425 is about 4324.5144236087. The cubic root of 18701425 is about 265.4350277186.

The spelling of 18701425 in words is "eighteen million, seven hundred one thousand, four hundred twenty-five".