18704011 has 4 divisors (see below), whose sum is σ = 19139032. Its totient is φ = 18268992.

The previous prime is 18703969. The next prime is 18704041. The reversal of 18704011 is 11040781.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11040781 = 353 ⋅31277.

It is a cyclic number.

It is not a de Polignac number, because 18704011 - 2¹³ = 18695819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18704041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217446 + ... + 217531.

It is an arithmetic number, because the mean of its divisors is an integer number (4784758).

Almost surely, 2^18704011 is an apocalyptic number.

18704011 is a deficient number, since it is larger than the sum of its proper divisors (435021).

18704011 is an equidigital number, since it uses as much as digits as its factorization.

18704011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435020.

The product of its (nonzero) digits is 224, while the sum is 22.

The square root of 18704011 is about 4324.8134063795. The cubic root of 18704011 is about 265.4472617836.

Adding to 18704011 its reverse (11040781), we get a palindrome (29744792).

The spelling of 18704011 in words is "eighteen million, seven hundred four thousand, eleven".