20344145220402 has 16 divisors (see below), whose sum is σ = 40695954526080. Its totient is φ = 6780104392592.

The previous prime is 20344145220397. The next prime is 20344145220409. The reversal of 20344145220402 is 20402254144302.

It is not an unprimeable number, because it can be changed into a prime (20344145220409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 319302378 + ... + 319366085.

It is an arithmetic number, because the mean of its divisors is an integer number (2543497157880).

Almost surely, 2^{20344145220402} is an apocalyptic number.

20344145220402 is an abundant number, since it is smaller than the sum of its proper divisors (20351809305678).

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

20344145220402 is a wasteful number, since it uses less digits than its factorization.

20344145220402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638673777.

The product of its (nonzero) digits is 61440, while the sum is 33.

Adding to 20344145220402 its reverse (20402254144302), we get a palindrome (40746399364704).

The spelling of 20344145220402 in words is "twenty trillion, three hundred forty-four billion, one hundred forty-five million, two hundred twenty thousand, four hundred two".