20448880650641 has 16 divisors (see below), whose sum is σ = 21629464969728. Its totient is φ = 19301127638400.

The previous prime is 20448880650623. The next prime is 20448880650661. The reversal of 20448880650641 is 14605608884402.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20448880650641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20448880650661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2240291 + ... + 6776183.

It is an arithmetic number, because the mean of its divisors is an integer number (1351841560608).

Almost surely, 2^{20448880650641} is an apocalyptic number.

It is an amenable number.

20448880650641 is a deficient number, since it is larger than the sum of its proper divisors (1180584319087).

20448880650641 is a wasteful number, since it uses less digits than its factorization.

20448880650641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4539512.

The product of its (nonzero) digits is 11796480, while the sum is 56.

The spelling of 20448880650641 in words is "twenty trillion, four hundred forty-eight billion, eight hundred eighty million, six hundred fifty thousand, six hundred forty-one".