18725693 has 18 divisors (see below), whose sum is σ = 22384926. Its totient is φ = 15618288.

The previous prime is 18725671. The next prime is 18725711. The reversal of 18725693 is 39652781.

It can be written as a sum of positive squares in only one way, i.e., 18292729 + 432964 = 4277^2 + 658^2 .

It is not a de Polignac number, because 18725693 - 2¹⁶ = 18660157 is a prime.

It is a super-3 number, since 3×18725693³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18725693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18725593) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 108155 + ... + 108327.

It is an arithmetic number, because the mean of its divisors is an integer number (1243607).

Almost surely, 2^18725693 is an apocalyptic number.

It is an amenable number.

18725693 is a deficient number, since it is larger than the sum of its proper divisors (3659233).

18725693 is an equidigital number, since it uses as much as digits as its factorization.

18725693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281 (or 227 counting only the distinct ones).

The product of its digits is 90720, while the sum is 41.

The square root of 18725693 is about 4327.3193780908. The cubic root of 18725693 is about 265.5497924660.

The spelling of 18725693 in words is "eighteen million, seven hundred twenty-five thousand, six hundred ninety-three".