18421075 has 6 divisors (see below), whose sum is σ = 22842164. Its totient is φ = 14736840.

The previous prime is 18421057. The next prime is 18421093. The reversal of 18421075 is 57012481.

It is an interprime number because it is at equal distance from previous prime (18421057) and next prime (18421093).

It is not a de Polignac number, because 18421075 - 2⁵ = 18421043 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 368397 + ... + 368446.

Almost surely, 2^18421075 is an apocalyptic number.

18421075 is a deficient number, since it is larger than the sum of its proper divisors (4421089).

18421075 is an equidigital number, since it uses as much as digits as its factorization.

18421075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736853 (or 736848 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 18421075 is about 4291.9779822362. The cubic root of 18421075 is about 264.1019798469.

The spelling of 18421075 in words is "eighteen million, four hundred twenty-one thousand, seventy-five".