20322240636 has 12 divisors (see below), whose sum is σ = 47418561512. Its totient is φ = 6774080208.

The previous prime is 20322240629. The next prime is 20322240637. The reversal of 20322240636 is 63604222302.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20322240637) 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, 846760015 + ... + 846760038.

Almost surely, 2^20322240636 is an apocalyptic number.

It is an amenable number.

20322240636 is an abundant number, since it is smaller than the sum of its proper divisors (27096320876).

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

20322240636 is a wasteful number, since it uses less digits than its factorization.

20322240636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1693520060 (or 1693520058 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 30.

Adding to 20322240636 its reverse (63604222302), we get a palindrome (83926462938).

The spelling of 20322240636 in words is "twenty billion, three hundred twenty-two million, two hundred forty thousand, six hundred thirty-six".