20344240432 has 40 divisors (see below), whose sum is σ = 40688016336. Its totient is φ = 9846902016.

The previous prime is 20344240421. The next prime is 20344240447. The reversal of 20344240432 is 23404244302.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20344240432.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 29403 + ... + 203845.

Almost surely, 2^20344240432 is an apocalyptic number.

It is an amenable number.

20344240432 is a deficient number, since it is larger than the sum of its proper divisors (20343775904).

20344240432 is a wasteful number, since it uses less digits than its factorization.

20344240432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174685 (or 174679 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 28.

Adding to 20344240432 its reverse (23404244302), we get a palindrome (43748484734).

The spelling of 20344240432 in words is "twenty billion, three hundred forty-four million, two hundred forty thousand, four hundred thirty-two".