22124420145 has 12 divisors (see below), whose sum is σ = 38348994996. Its totient is φ = 11799690720.

The previous prime is 22124420141. The next prime is 22124420147. The reversal of 22124420145 is 54102442122.

It is a happy number.

22124420145 is a `hidden beast` number, since 2 + 212 + 442 + 0 + 1 + 4 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 13370759424 + 8753660721 = 115632^2 + 93561^2 .

It is not a de Polignac number, because 22124420145 - 2² = 22124420141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22124420141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 245826846 + ... + 245826935.

It is an arithmetic number, because the mean of its divisors is an integer number (3195749583).

Almost surely, 2^22124420145 is an apocalyptic number.

It is an amenable number.

22124420145 is a deficient number, since it is larger than the sum of its proper divisors (16224574851).

22124420145 is a wasteful number, since it uses less digits than its factorization.

22124420145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491653792 (or 491653789 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

Adding to 22124420145 its reverse (54102442122), we get a palindrome (76226862267).

The spelling of 22124420145 in words is "twenty-two billion, one hundred twenty-four million, four hundred twenty thousand, one hundred forty-five".