20448664511 has 8 divisors (see below), whose sum is σ = 22308958848. Its totient is φ = 18588591000.

The previous prime is 20448664499. The next prime is 20448664513. The reversal of 20448664511 is 11546684402.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20448664511 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20448664513) 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, 183206 + ... + 272876.

It is an arithmetic number, because the mean of its divisors is an integer number (2788619856).

Almost surely, 2^20448664511 is an apocalyptic number.

20448664511 is a deficient number, since it is larger than the sum of its proper divisors (1860294337).

20448664511 is a wasteful number, since it uses less digits than its factorization.

20448664511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110413.

The product of its (nonzero) digits is 184320, while the sum is 41.

The spelling of 20448664511 in words is "twenty billion, four hundred forty-eight million, six hundred sixty-four thousand, five hundred eleven".