20648650928641 has 8 divisors (see below), whose sum is σ = 21129409851264. Its totient is φ = 20167917357840.

The previous prime is 20648650928629. The next prime is 20648650928681. The reversal of 20648650928641 is 14682905684602.

It is a happy number.

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 20648650928641 - 2¹⁹ = 20648650404353 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20648650928641.

It is not an unprimeable number, because it can be changed into a prime (20648650928681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4685065 + ... + 7952806.

It is an arithmetic number, because the mean of its divisors is an integer number (2641176231408).

Almost surely, 2^{20648650928641} is an apocalyptic number.

It is an amenable number.

20648650928641 is a deficient number, since it is larger than the sum of its proper divisors (480758922623).

20648650928641 is a wasteful number, since it uses less digits than its factorization.

20648650928641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12675911.

The product of its (nonzero) digits is 39813120, while the sum is 61.

The spelling of 20648650928641 in words is "twenty trillion, six hundred forty-eight billion, six hundred fifty million, nine hundred twenty-eight thousand, six hundred forty-one".