18146493 has 6 divisors (see below), whose sum is σ = 26211614. Its totient is φ = 12097656.

The previous prime is 18146459. The next prime is 18146507. The reversal of 18146493 is 39464181.

18146493 is a `hidden beast` number, since 1 + 8 + 1 + 4 + 649 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 13972644 + 4173849 = 3738^2 + 2043^2 .

It is not a de Polignac number, because 18146493 - 2¹⁶ = 18080957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18146423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1008130 + ... + 1008147.

Almost surely, 2^18146493 is an apocalyptic number.

It is an amenable number.

18146493 is a deficient number, since it is larger than the sum of its proper divisors (8065121).

18146493 is a wasteful number, since it uses less digits than its factorization.

18146493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2016283 (or 2016280 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 18146493 is about 4259.8700684411. The cubic root of 18146493 is about 262.7831828302.

The spelling of 18146493 in words is "eighteen million, one hundred forty-six thousand, four hundred ninety-three".