18428493 has 16 divisors (see below), whose sum is σ = 26199936. Its totient is φ = 11481600.

The previous prime is 18428483. The next prime is 18428507. The reversal of 18428493 is 39482481.

It is not a de Polignac number, because 18428493 - 2¹³ = 18420301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18428413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6505 + ... + 8897.

It is an arithmetic number, because the mean of its divisors is an integer number (1637496).

Almost surely, 2^18428493 is an apocalyptic number.

It is an amenable number.

18428493 is a deficient number, since it is larger than the sum of its proper divisors (7771443).

18428493 is a wasteful number, since it uses less digits than its factorization.

18428493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2564.

The product of its digits is 55296, while the sum is 39.

The square root of 18428493 is about 4292.8420655785. The cubic root of 18428493 is about 264.1374255809.

The spelling of 18428493 in words is "eighteen million, four hundred twenty-eight thousand, four hundred ninety-three".