22145436 has 18 divisors (see below), whose sum is σ = 55978832. Its totient is φ = 7381800.

The previous prime is 22145429. The next prime is 22145437. The reversal of 22145436 is 63454122.

22145436 is a `hidden beast` number, since 221 + 4 + 5 + 436 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22145437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 307540 + ... + 307611.

Almost surely, 2^22145436 is an apocalyptic number.

It is an amenable number.

22145436 is an abundant number, since it is smaller than the sum of its proper divisors (33833396).

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

22145436 is a wasteful number, since it uses less digits than its factorization.

22145436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615161 (or 615156 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 22145436 is about 4705.8937514568. The cubic root of 22145436 is about 280.8200280355.

Adding to 22145436 its reverse (63454122), we get a palindrome (85599558).

The spelling of 22145436 in words is "twenty-two million, one hundred forty-five thousand, four hundred thirty-six".