18946459 has 4 divisors (see below), whose sum is σ = 21653104. Its totient is φ = 16239816.

The previous prime is 18946451. The next prime is 18946511. The reversal of 18946459 is 95464981.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95464981 = 1979 ⋅48239.

It is a cyclic number.

It is not a de Polignac number, because 18946459 - 2³ = 18946451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18946451) 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 3 ways as a sum of consecutive naturals, for example, 1353312 + ... + 1353325.

It is an arithmetic number, because the mean of its divisors is an integer number (5413276).

Almost surely, 2^18946459 is an apocalyptic number.

18946459 is a deficient number, since it is larger than the sum of its proper divisors (2706645).

18946459 is an equidigital number, since it uses as much as digits as its factorization.

18946459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2706644.

The product of its digits is 311040, while the sum is 46.

The square root of 18946459 is about 4352.7530368722. The cubic root of 18946459 is about 266.5892818859.

The spelling of 18946459 in words is "eighteen million, nine hundred forty-six thousand, four hundred fifty-nine".