22142065640 has 16 divisors (see below), whose sum is σ = 49819647780. Its totient is φ = 8856826240.

The previous prime is 22142065639. The next prime is 22142065643. The reversal of 22142065640 is 4656024122.

It can be written as a sum of positive squares in 2 ways, for example, as 19322668036 + 2819397604 = 139006^2 + 53098^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22142065597 and 22142065606.

It is not an unprimeable number, because it can be changed into a prime (22142065643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276775781 + ... + 276775860.

Almost surely, 2^22142065640 is an apocalyptic number.

22142065640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22142065640 is an abundant number, since it is smaller than the sum of its proper divisors (27677582140).

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

22142065640 is a wasteful number, since it uses less digits than its factorization.

22142065640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553551652 (or 553551648 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

Adding to 22142065640 its reverse (4656024122), we get a palindrome (26798089762).

The spelling of 22142065640 in words is "twenty-two billion, one hundred forty-two million, sixty-five thousand, six hundred forty".