22911012 has 66 divisors (see below), whose sum is σ = 60761078. Its totient is φ = 7558272.

The previous prime is 22911001. The next prime is 22911041. The reversal of 22911012 is 21011922.

It can be written as a sum of positive squares in only one way, i.e., 19131876 + 3779136 = 4374^2 + 1944^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 21 ways as a sum of consecutive naturals, for example, 236148 + ... + 236244.

Almost surely, 2^22911012 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 22911012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30380539).

22911012 is an abundant number, since it is smaller than the sum of its proper divisors (37850066).

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

22911012 is an frugal number, since it uses more digits than its factorization.

22911012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131 (or 102 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 22911012 is about 4786.5448916729. The cubic root of 22911012 is about 284.0194557854.

Adding to 22911012 its reverse (21011922), we get a palindrome (43922934).

The spelling of 22911012 in words is "twenty-two million, nine hundred eleven thousand, twelve".