18268011 has 16 divisors (see below), whose sum is σ = 27401120. Its totient is φ = 12177216.

The previous prime is 18268009. The next prime is 18268043. The reversal of 18268011 is 11086281.

It is not a de Polignac number, because 18268011 - 2¹ = 18268009 is a prime.

It is a super-2 number, since 2×18268011² = 667440451792242, which contains 22 as substring.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18268711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1990 + ... + 6363.

It is an arithmetic number, because the mean of its divisors is an integer number (1712570).

Almost surely, 2^18268011 is an apocalyptic number.

18268011 is a deficient number, since it is larger than the sum of its proper divisors (9133109).

18268011 is an frugal number, since it uses more digits than its factorization.

18268011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8374 (or 8356 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 27.

The square root of 18268011 is about 4274.1093809120. The cubic root of 18268011 is about 263.3684542521.

The spelling of 18268011 in words is "eighteen million, two hundred sixty-eight thousand, eleven".