18982479 has 8 divisors (see below), whose sum is σ = 25898752. Its totient is φ = 12360600.

The previous prime is 18982477. The next prime is 18982487. The reversal of 18982479 is 97428981.

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

It is not a de Polignac number, because 18982479 - 2¹ = 18982477 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 (18982471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73447 + ... + 73704.

It is an arithmetic number, because the mean of its divisors is an integer number (3237344).

Almost surely, 2^18982479 is an apocalyptic number.

18982479 is a deficient number, since it is larger than the sum of its proper divisors (6916273).

18982479 is a wasteful number, since it uses less digits than its factorization.

18982479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147197.

The product of its digits is 290304, while the sum is 48.

The square root of 18982479 is about 4356.8886834529. Note that the first 3 decimals coincide. The cubic root of 18982479 is about 266.7581167250.

The spelling of 18982479 in words is "eighteen million, nine hundred eighty-two thousand, four hundred seventy-nine".