11021864 has 48 divisors (see below), whose sum is σ = 24842880. Its totient is φ = 4566240.

The previous prime is 11021863. The next prime is 11021867. The reversal of 11021864 is 46812011.

It is not an unprimeable number, because it can be changed into a prime (11021861) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11699 + ... + 12605.

It is an arithmetic number, because the mean of its divisors is an integer number (517560).

Almost surely, 2^11021864 is an apocalyptic number.

11021864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11021864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12421440).

11021864 is an abundant number, since it is smaller than the sum of its proper divisors (13821016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11021864 is a wasteful number, since it uses less digits than its factorization.

11021864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 958 (or 947 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 11021864 is about 3319.9192761271. The cubic root of 11021864 is about 222.5452603293.

Adding to 11021864 its reverse (46812011), we get a palindrome (57833875).

The spelling of 11021864 in words is "eleven million, twenty-one thousand, eight hundred sixty-four".