18979486 has 8 divisors (see below), whose sum is σ = 28572840. Its totient is φ = 9455208.

The previous prime is 18979453. The next prime is 18979487. The reversal of 18979486 is 68497981.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18979487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16576 + ... + 17683.

It is an arithmetic number, because the mean of its divisors is an integer number (3571605).

Almost surely, 2^18979486 is an apocalyptic number.

18979486 is a deficient number, since it is larger than the sum of its proper divisors (9593354).

18979486 is a wasteful number, since it uses less digits than its factorization.

18979486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34538.

The product of its digits is 870912, while the sum is 52.

The square root of 18979486 is about 4356.5451908594. The cubic root of 18979486 is about 266.7440959183.

The spelling of 18979486 in words is "eighteen million, nine hundred seventy-nine thousand, four hundred eighty-six".