18494019 has 12 divisors (see below), whose sum is σ = 26816400. Its totient is φ = 12281904.

The previous prime is 18493997. The next prime is 18494033. The reversal of 18494019 is 91049481.

It is not a de Polignac number, because 18494019 - 2⁹ = 18493507 is a prime.

It is a super-2 number, since 2×18494019² = 684057477544722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18494519) 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, 1399 + ... + 6240.

It is an arithmetic number, because the mean of its divisors is an integer number (2234700).

Almost surely, 2^18494019 is an apocalyptic number.

18494019 is a deficient number, since it is larger than the sum of its proper divisors (8322381).

18494019 is a wasteful number, since it uses less digits than its factorization.

18494019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7914 (or 7911 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 18494019 is about 4300.4673001896. The cubic root of 18494019 is about 264.4501188212.

The spelling of 18494019 in words is "eighteen million, four hundred ninety-four thousand, nineteen".