18742525 has 6 divisors (see below), whose sum is σ = 23240762. Its totient is φ = 14994000.

The previous prime is 18742523. The next prime is 18742541. The reversal of 18742525 is 52524781.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 3485689 + 15256836 = 1867^2 + 3906^2 .

It is not a de Polignac number, because 18742525 - 2¹ = 18742523 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18742523) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 374826 + ... + 374875.

Almost surely, 2^18742525 is an apocalyptic number.

It is an amenable number.

18742525 is a deficient number, since it is larger than the sum of its proper divisors (4498237).

18742525 is an equidigital number, since it uses as much as digits as its factorization.

18742525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749711 (or 749706 counting only the distinct ones).

The product of its digits is 22400, while the sum is 34.

The square root of 18742525 is about 4329.2637942265. The cubic root of 18742525 is about 265.6293337240.

The spelling of 18742525 in words is "eighteen million, seven hundred forty-two thousand, five hundred twenty-five".