18485019 has 12 divisors (see below), whose sum is σ = 30515056. Its totient is φ = 10562832.

The previous prime is 18485011. The next prime is 18485039. The reversal of 18485019 is 91058481.

It is not a de Polignac number, because 18485019 - 2³ = 18485011 is a prime.

It is a super-2 number, since 2×18485019² = 683391854860722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18485011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 146644 + ... + 146769.

Almost surely, 2^18485019 is an apocalyptic number.

18485019 is a deficient number, since it is larger than the sum of its proper divisors (12030037).

18485019 is a wasteful number, since it uses less digits than its factorization.

18485019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293426 (or 293423 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 18485019 is about 4299.4207749417. The cubic root of 18485019 is about 264.4072141890.

The spelling of 18485019 in words is "eighteen million, four hundred eighty-five thousand, nineteen".