20402022204424 has 16 divisors (see below), whose sum is σ = 43718619009600. Its totient is φ = 8743723801872.

The previous prime is 20402022204397. The next prime is 20402022204427. The reversal of 20402022204424 is 42440222020402.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 20402022204392 and 20402022204401.

It is not an unprimeable number, because it can be changed into a prime (20402022204427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182160912484 + ... + 182160912595.

It is an arithmetic number, because the mean of its divisors is an integer number (2732413688100).

Almost surely, 2^{20402022204424} is an apocalyptic number.

It is an amenable number.

20402022204424 is an abundant number, since it is smaller than the sum of its proper divisors (23316596805176).

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

20402022204424 is a wasteful number, since it uses less digits than its factorization.

20402022204424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364321825092 (or 364321825088 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 28.

Adding to 20402022204424 its reverse (42440222020402), we get a palindrome (62842244224826).

The spelling of 20402022204424 in words is "twenty trillion, four hundred two billion, twenty-two million, two hundred four thousand, four hundred twenty-four".