22420512 has 36 divisors (see below), whose sum is σ = 63759150. Its totient is φ = 7473408.

The previous prime is 22420507. The next prime is 22420523. The reversal of 22420512 is 21502422.

It can be written as a sum of positive squares in only one way, i.e., 21566736 + 853776 = 4644^2 + 924^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38637 + ... + 39212.

Almost surely, 2^22420512 is an apocalyptic number.

It is an amenable number.

22420512 is an abundant number, since it is smaller than the sum of its proper divisors (41338638).

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

22420512 is a wasteful number, since it uses less digits than its factorization.

22420512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77865 (or 77854 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 22420512 is about 4735.0303061332. The cubic root of 22420512 is about 281.9779671937.

Adding to 22420512 its reverse (21502422), we get a palindrome (43922934).

It can be divided in two parts, 224 and 20512, that added together give a 4-th power (20736 = 12⁴).

The spelling of 22420512 in words is "twenty-two million, four hundred twenty thousand, five hundred twelve".