22505312013 has 8 divisors (see below), whose sum is σ = 30066740928. Its totient is φ = 14973712224.

The previous prime is 22505311999. The next prime is 22505312041. The reversal of 22505312013 is 31021350522.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22505312013 - 2⁵ = 22505311981 is a prime.

It is a super-2 number, since 2×22505312013² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22505312213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7455520 + ... + 7458537.

It is an arithmetic number, because the mean of its divisors is an integer number (3758342616).

Almost surely, 2^22505312013 is an apocalyptic number.

It is an amenable number.

22505312013 is a deficient number, since it is larger than the sum of its proper divisors (7561428915).

22505312013 is a wasteful number, since it uses less digits than its factorization.

22505312013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14914563.

The product of its (nonzero) digits is 1800, while the sum is 24.

Adding to 22505312013 its reverse (31021350522), we get a palindrome (53526662535).

The spelling of 22505312013 in words is "twenty-two billion, five hundred five million, three hundred twelve thousand, thirteen".