18813925 has 36 divisors (see below), whose sum is σ = 26027724. Its totient is φ = 13478400.

The previous prime is 18813913. The next prime is 18813941. The reversal of 18813925 is 52931881.

It can be written as a sum of positive squares in 18 ways, for example, as 18809569 + 4356 = 4337^2 + 66^2 .

It is not a de Polignac number, because 18813925 - 2¹³ = 18805733 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 257689 + ... + 257761.

Almost surely, 2^18813925 is an apocalyptic number.

It is an amenable number.

18813925 is a deficient number, since it is larger than the sum of its proper divisors (7213799).

18813925 is a wasteful number, since it uses less digits than its factorization.

18813925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170 (or 152 counting only the distinct ones).

The product of its digits is 17280, while the sum is 37.

The square root of 18813925 is about 4337.5021613827. The cubic root of 18813925 is about 265.9662129434.

The spelling of 18813925 in words is "eighteen million, eight hundred thirteen thousand, nine hundred twenty-five".