22011136 has 72 divisors (see below), whose sum is σ = 51214464. Its totient is φ = 9246720.

The previous prime is 22011131. The next prime is 22011149. The reversal of 22011136 is 63111022.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22011131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127146 + ... + 127318.

It is an arithmetic number, because the mean of its divisors is an integer number (711312).

Almost surely, 2^22011136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22011136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25607232).

22011136 is an abundant number, since it is smaller than the sum of its proper divisors (29203328).

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

22011136 is an equidigital number, since it uses as much as digits as its factorization.

22011136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267 (or 253 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 22011136 is about 4691.6027112278. The cubic root of 22011136 is about 280.2512031361.

Adding to 22011136 its reverse (63111022), we get a palindrome (85122158).

The spelling of 22011136 in words is "twenty-two million, eleven thousand, one hundred thirty-six".