18525416 has 32 divisors (see below), whose sum is σ = 42752640. Its totient is φ = 7328448.

The previous prime is 18525407. The next prime is 18525431. The reversal of 18525416 is 61452581.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11996 + ... + 13451.

It is an arithmetic number, because the mean of its divisors is an integer number (1336020).

Almost surely, 2^18525416 is an apocalyptic number.

It is an amenable number.

18525416 is an abundant number, since it is smaller than the sum of its proper divisors (24227224).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18525416 is a wasteful number, since it uses less digits than its factorization.

18525416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25473 (or 25469 counting only the distinct ones).

The product of its digits is 9600, while the sum is 32.

The square root of 18525416 is about 4304.1161694360. The cubic root of 18525416 is about 264.5996851255.

Adding to 18525416 its reverse (61452581), we get a palindrome (79977997).

The spelling of 18525416 in words is "eighteen million, five hundred twenty-five thousand, four hundred sixteen".