18134779 has 4 divisors (see below), whose sum is σ = 19529776. Its totient is φ = 16739784.

The previous prime is 18134761. The next prime is 18134789. The reversal of 18134779 is 97743181.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18134779 - 2¹³ = 18126587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18134789) 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, 697479 + ... + 697504.

It is an arithmetic number, because the mean of its divisors is an integer number (4882444).

Almost surely, 2^18134779 is an apocalyptic number.

18134779 is a deficient number, since it is larger than the sum of its proper divisors (1394997).

18134779 is a wasteful number, since it uses less digits than its factorization.

18134779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1394996.

The product of its digits is 42336, while the sum is 40.

The square root of 18134779 is about 4258.4949219178. The cubic root of 18134779 is about 262.7266263595.

The spelling of 18134779 in words is "eighteen million, one hundred thirty-four thousand, seven hundred seventy-nine".