22051664 has 40 divisors (see below), whose sum is σ = 46044672. Its totient is φ = 10200960.

The previous prime is 22051661. The next prime is 22051709. The reversal of 22051664 is 46615022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22051661) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 10442 + ... + 12374.

Almost surely, 2^22051664 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 22051664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23022336).

22051664 is an abundant number, since it is smaller than the sum of its proper divisors (23993008).

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

22051664 is a wasteful number, since it uses less digits than its factorization.

22051664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1995 (or 1989 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 22051664 is about 4695.9199311743. The cubic root of 22051664 is about 280.4231018347.

Adding to 22051664 its reverse (46615022), we get a palindrome (68666686).

The spelling of 22051664 in words is "twenty-two million, fifty-one thousand, six hundred sixty-four".