20202232344640 has 56 divisors (see below), whose sum is σ = 50638490300160. Its totient is φ = 7655582780928.

The previous prime is 20202232344607. The next prime is 20202232344643. The reversal of 20202232344640 is 4644323220202.

It is a junction number, because it is equal to n+sod(n) for n = 20202232344596 and 20202232344605.

It is not an unprimeable number, because it can be changed into a prime (20202232344643) 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, 1661361712 + ... + 1661373871.

It is an arithmetic number, because the mean of its divisors is an integer number (904258755360).

Almost surely, 2^{20202232344640} is an apocalyptic number.

20202232344640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20202232344640 is an abundant number, since it is smaller than the sum of its proper divisors (30436257955520).

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

20202232344640 is a wasteful number, since it uses less digits than its factorization.

20202232344640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3322735619 (or 3322735609 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 34.

Adding to 20202232344640 its reverse (4644323220202), we get a palindrome (24846555564842).

The spelling of 20202232344640 in words is "twenty trillion, two hundred two billion, two hundred thirty-two million, three hundred forty-four thousand, six hundred forty".