20648700221045 has 8 divisors (see below), whose sum is σ = 26684474131896. Its totient is φ = 15248270932416.

The previous prime is 20648700221041. The next prime is 20648700221057. The reversal of 20648700221045 is 54012200784602.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1153667179921 + 19495033041124 = 1074089^2 + 4415318^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20648700221045 - 2² = 20648700221041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20648700220993 and 20648700221011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20648700221041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158836155482 + ... + 158836155611.

It is an arithmetic number, because the mean of its divisors is an integer number (3335559266487).

Almost surely, 2^{20648700221045} is an apocalyptic number.

It is an amenable number.

20648700221045 is a deficient number, since it is larger than the sum of its proper divisors (6035773910851).

20648700221045 is a wasteful number, since it uses less digits than its factorization.

20648700221045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317672311111.

The product of its (nonzero) digits is 215040, while the sum is 41.

The spelling of 20648700221045 in words is "twenty trillion, six hundred forty-eight billion, seven hundred million, two hundred twenty-one thousand, forty-five".