18519428 has 12 divisors (see below), whose sum is σ = 32515392. Its totient is φ = 9229320.

The previous prime is 18519407. The next prime is 18519437. The reversal of 18519428 is 82491581.

It is a junction number, because it is equal to n+sod(n) for n = 18519391 and 18519400.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6200 + ... + 8687.

It is an arithmetic number, because the mean of its divisors is an integer number (2709616).

Almost surely, 2^18519428 is an apocalyptic number.

It is an amenable number.

18519428 is a deficient number, since it is larger than the sum of its proper divisors (13995964).

18519428 is a wasteful number, since it uses less digits than its factorization.

18519428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15202 (or 15200 counting only the distinct ones).

The product of its digits is 23040, while the sum is 38.

The square root of 18519428 is about 4303.4205000209. The cubic root of 18519428 is about 264.5711730594.

The spelling of 18519428 in words is "eighteen million, five hundred nineteen thousand, four hundred twenty-eight".