22020421345 has 16 divisors (see below), whose sum is σ = 28476628992. Its totient is φ = 16250109120.

The previous prime is 22020421343. The next prime is 22020421361. The reversal of 22020421345 is 54312402022.

It is not a de Polignac number, because 22020421345 - 2¹ = 22020421343 is a prime.

It is a super-2 number, since 2×22020421345² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22020421343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19537 + ... + 210766.

It is an arithmetic number, because the mean of its divisors is an integer number (1779789312).

Almost surely, 2^22020421345 is an apocalyptic number.

It is an amenable number.

22020421345 is a deficient number, since it is larger than the sum of its proper divisors (6456207647).

22020421345 is a wasteful number, since it uses less digits than its factorization.

22020421345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231792.

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 22020421345 its reverse (54312402022), we get a palindrome (76332823367).

The spelling of 22020421345 in words is "twenty-two billion, twenty million, four hundred twenty-one thousand, three hundred forty-five".