18383479 has 4 divisors (see below), whose sum is σ = 18486360. Its totient is φ = 18280600.

The previous prime is 18383447. The next prime is 18383483. The reversal of 18383479 is 97438381.

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: 97438381 = 5347 ⋅18223.

It is a cyclic number.

It is not a de Polignac number, because 18383479 - 2⁵ = 18383447 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 (18384479) 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, 51172 + ... + 51529.

It is an arithmetic number, because the mean of its divisors is an integer number (4621590).

Almost surely, 2^18383479 is an apocalyptic number.

18383479 is a deficient number, since it is larger than the sum of its proper divisors (102881).

18383479 is a wasteful number, since it uses less digits than its factorization.

18383479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102880.

The product of its digits is 145152, while the sum is 43.

The square root of 18383479 is about 4287.5959464483. The cubic root of 18383479 is about 263.9221868543.

The spelling of 18383479 in words is "eighteen million, three hundred eighty-three thousand, four hundred seventy-nine".