18428755 has 4 divisors (see below), whose sum is σ = 22114512. Its totient is φ = 14743000.

The previous prime is 18428749. The next prime is 18428783. The reversal of 18428755 is 55782481.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 18428755 - 2²¹ = 16331603 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

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, 1842871 + ... + 1842880.

It is an arithmetic number, because the mean of its divisors is an integer number (5528628).

Almost surely, 2^18428755 is an apocalyptic number.

18428755 is a deficient number, since it is larger than the sum of its proper divisors (3685757).

18428755 is an equidigital number, since it uses as much as digits as its factorization.

18428755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3685756.

The product of its digits is 89600, while the sum is 40.

The square root of 18428755 is about 4292.8725813842. The cubic root of 18428755 is about 264.1386773323.

The spelling of 18428755 in words is "eighteen million, four hundred twenty-eight thousand, seven hundred fifty-five".