18750011 has 8 divisors (see below), whose sum is σ = 21573600. Its totient is φ = 15962688.

The previous prime is 18750001. The next prime is 18750019. The reversal of 18750011 is 11005781.

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

It is not a de Polignac number, because 18750011 - 2¹⁸ = 18487867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18750019) 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 7 ways as a sum of consecutive naturals, for example, 7946 + ... + 10031.

It is an arithmetic number, because the mean of its divisors is an integer number (2696700).

Almost surely, 2^18750011 is an apocalyptic number.

18750011 is a deficient number, since it is larger than the sum of its proper divisors (2823589).

18750011 is a wasteful number, since it uses less digits than its factorization.

18750011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18133.

The product of its (nonzero) digits is 280, while the sum is 23.

The square root of 18750011 is about 4330.1282890926. The cubic root of 18750011 is about 265.6646942478.

Adding to 18750011 its reverse (11005781), we get a palindrome (29755792).

The spelling of 18750011 in words is "eighteen million, seven hundred fifty thousand, eleven".