18145479 has 8 divisors (see below), whose sum is σ = 26393472. Its totient is φ = 10997240.

The previous prime is 18145471. The next prime is 18145481. The reversal of 18145479 is 97454181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18145479 - 2³ = 18145471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18145471) 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 7 ways as a sum of consecutive naturals, for example, 274899 + ... + 274964.

It is an arithmetic number, because the mean of its divisors is an integer number (3299184).

Almost surely, 2^18145479 is an apocalyptic number.

18145479 is a deficient number, since it is larger than the sum of its proper divisors (8247993).

18145479 is a wasteful number, since it uses less digits than its factorization.

18145479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549877.

The product of its digits is 40320, while the sum is 39.

The square root of 18145479 is about 4259.7510490638. The cubic root of 18145479 is about 262.7782880899.

The spelling of 18145479 in words is "eighteen million, one hundred forty-five thousand, four hundred seventy-nine".