11009851 has 4 divisors (see below), whose sum is σ = 11023992. Its totient is φ = 10995712.

The previous prime is 11009837. The next prime is 11009881. The reversal of 11009851 is 15890011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15890011 = 31 ⋅512581.

It is a cyclic number.

It is not a de Polignac number, because 11009851 - 2⁵ = 11009819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11009881) 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, 5830 + ... + 7483.

It is an arithmetic number, because the mean of its divisors is an integer number (2755998).

Almost surely, 2^11009851 is an apocalyptic number.

11009851 is a deficient number, since it is larger than the sum of its proper divisors (14141).

11009851 is an equidigital number, since it uses as much as digits as its factorization.

11009851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14140.

The product of its (nonzero) digits is 360, while the sum is 25.

The square root of 11009851 is about 3318.1095521396. The cubic root of 11009851 is about 222.4643784240.

Adding to 11009851 its reverse (15890011), we get a palindrome (26899862).

The spelling of 11009851 in words is "eleven million, nine thousand, eight hundred fifty-one".