18879706 has 4 divisors (see below), whose sum is σ = 28319562. Its totient is φ = 9439852.

The previous prime is 18879703. The next prime is 18879733. The reversal of 18879706 is 60797881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60797881 = 373 ⋅162997.

It can be written as a sum of positive squares in only one way, i.e., 10989225 + 7890481 = 3315^2 + 2809^2 .

It is not an unprimeable number, because it can be changed into a prime (18879703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4719925 + ... + 4719928.

Almost surely, 2^18879706 is an apocalyptic number.

18879706 is a deficient number, since it is larger than the sum of its proper divisors (9439856).

18879706 is an equidigital number, since it uses as much as digits as its factorization.

18879706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9439855.

The product of its (nonzero) digits is 169344, while the sum is 46.

The square root of 18879706 is about 4345.0783652312. The cubic root of 18879706 is about 266.2758270993.

The spelling of 18879706 in words is "eighteen million, eight hundred seventy-nine thousand, seven hundred six".