22012002405 has 12 divisors (see below), whose sum is σ = 38154137580. Its totient is φ = 11739734592.

The previous prime is 22012002401. The next prime is 22012002451. The reversal of 22012002405 is 50420021022.

22012002405 is a `hidden beast` number, since 220 + 1 + 200 + 240 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4444355556 + 17567646849 = 66666^2 + 132543^2 .

It is not a de Polignac number, because 22012002405 - 2² = 22012002401 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22012002401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 244577760 + ... + 244577849.

It is an arithmetic number, because the mean of its divisors is an integer number (3179511465).

Almost surely, 2^22012002405 is an apocalyptic number.

It is an amenable number.

22012002405 is a deficient number, since it is larger than the sum of its proper divisors (16142135175).

22012002405 is a wasteful number, since it uses less digits than its factorization.

22012002405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489155620 (or 489155617 counting only the distinct ones).

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

Adding to 22012002405 its reverse (50420021022), we get a palindrome (72432023427).

The spelling of 22012002405 in words is "twenty-two billion, twelve million, two thousand, four hundred five".