18461725 has 6 divisors (see below), whose sum is σ = 22892570. Its totient is φ = 14769360.

The previous prime is 18461717. The next prime is 18461731. The reversal of 18461725 is 52716481.

It can be written as a sum of positive squares in 3 ways, for example, as 1643524 + 16818201 = 1282^2 + 4101^2 .

It is not a de Polignac number, because 18461725 - 2³ = 18461717 is a prime.

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, 369210 + ... + 369259.

Almost surely, 2^18461725 is an apocalyptic number.

It is an amenable number.

18461725 is a deficient number, since it is larger than the sum of its proper divisors (4430845).

18461725 is an equidigital number, since it uses as much as digits as its factorization.

18461725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738479 (or 738474 counting only the distinct ones).

The product of its digits is 13440, while the sum is 34.

The square root of 18461725 is about 4296.7109514139. The cubic root of 18461725 is about 264.2961027605.

The spelling of 18461725 in words is "eighteen million, four hundred sixty-one thousand, seven hundred twenty-five".