18779042 has 8 divisors (see below), whose sum is σ = 28219116. Its totient is φ = 9372672.

The previous prime is 18779041. The next prime is 18779077. The reversal of 18779042 is 24097781.

It can be written as a sum of positive squares in 2 ways, for example, as 11909401 + 6869641 = 3451^2 + 2621^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 18778987 and 18779005.

It is not an unprimeable number, because it can be changed into a prime (18779041) 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, 6983 + ... + 9290.

Almost surely, 2^18779042 is an apocalyptic number.

18779042 is a deficient number, since it is larger than the sum of its proper divisors (9440074).

18779042 is a wasteful number, since it uses less digits than its factorization.

18779042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16852.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 18779042 is about 4333.4792026731. The cubic root of 18779042 is about 265.8017347840.

The spelling of 18779042 in words is "eighteen million, seven hundred seventy-nine thousand, forty-two".