20402240422 has 8 divisors (see below), whose sum is σ = 30604185000. Its totient is φ = 10200845424.

The previous prime is 20402240407. The next prime is 20402240423. The reversal of 20402240422 is 22404220402.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 20402240393 and 20402240402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20402240423) 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, 26772 + ... + 203767.

It is an arithmetic number, because the mean of its divisors is an integer number (3825523125).

Almost surely, 2^20402240422 is an apocalyptic number.

20402240422 is a deficient number, since it is larger than the sum of its proper divisors (10201944578).

20402240422 is a wasteful number, since it uses less digits than its factorization.

20402240422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274790.

The product of its (nonzero) digits is 2048, while the sum is 22.

Adding to 20402240422 its reverse (22404220402), we get a palindrome (42806460824).

The spelling of 20402240422 in words is "twenty billion, four hundred two million, two hundred forty thousand, four hundred twenty-two".