20659444346 has 4 divisors (see below), whose sum is σ = 30989166522. Its totient is φ = 10329722172.

The previous prime is 20659444343. The next prime is 20659444369. The reversal of 20659444346 is 64344495602.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 20323638721 + 335805625 = 142561^2 + 18325^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20659444346.

It is not an unprimeable number, because it can be changed into a prime (20659444343) 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 as a sum of consecutive naturals, namely, 5164861085 + ... + 5164861088.

Almost surely, 2^20659444346 is an apocalyptic number.

20659444346 is a deficient number, since it is larger than the sum of its proper divisors (10329722176).

20659444346 is a wasteful number, since it uses less digits than its factorization.

20659444346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10329722175.

The product of its (nonzero) digits is 2488320, while the sum is 47.

The spelling of 20659444346 in words is "twenty billion, six hundred fifty-nine million, four hundred forty-four thousand, three hundred forty-six".