18916011 has 20 divisors (see below), whose sum is σ = 28380792. Its totient is φ = 12555648.

The previous prime is 18915989. The next prime is 18916031. The reversal of 18916011 is 11061981.

It is not a de Polignac number, because 18916011 - 2¹⁸ = 18653867 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (18916031) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 27771 + ... + 28443.

Almost surely, 2^18916011 is an apocalyptic number.

18916011 is a deficient number, since it is larger than the sum of its proper divisors (9464781).

18916011 is an equidigital number, since it uses as much as digits as its factorization.

18916011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1032 (or 1023 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 27.

The square root of 18916011 is about 4349.2540739764. The cubic root of 18916011 is about 266.4463974459.

Adding to 18916011 its reverse (11061981), we get a palindrome (29977992).

The spelling of 18916011 in words is "eighteen million, nine hundred sixteen thousand, eleven".