20716217446 has 16 divisors (see below), whose sum is σ = 32738857200. Its totient is φ = 9804233088.

The previous prime is 20716217437. The next prime is 20716217447. The reversal of 20716217446 is 64471261702.

It is a junction number, because it is equal to n+sod(n) for n = 20716217399 and 20716217408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20716217447) 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, 198535 + ... + 284338.

It is an arithmetic number, because the mean of its divisors is an integer number (2046178575).

Almost surely, 2^20716217446 is an apocalyptic number.

20716217446 is a deficient number, since it is larger than the sum of its proper divisors (12022639754).

20716217446 is a wasteful number, since it uses less digits than its factorization.

20716217446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484023.

The product of its (nonzero) digits is 112896, while the sum is 40.

The spelling of 20716217446 in words is "twenty billion, seven hundred sixteen million, two hundred seventeen thousand, four hundred forty-six".