20516922216520 has 64 divisors (see below), whose sum is σ = 46193455526400. Its totient is φ = 8201369045760.

The previous prime is 20516922216491. The next prime is 20516922216529. The reversal of 20516922216520 is 2561222961502.

It is not an unprimeable number, because it can be changed into a prime (20516922216529) 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, 1000376026 + ... + 1000396534.

It is an arithmetic number, because the mean of its divisors is an integer number (721772742600).

Almost surely, 2^{20516922216520} is an apocalyptic number.

20516922216520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20516922216520 is an abundant number, since it is smaller than the sum of its proper divisors (25676533309880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20516922216520 is a wasteful number, since it uses less digits than its factorization.

20516922216520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35758 (or 35754 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 43.

The spelling of 20516922216520 in words is "twenty trillion, five hundred sixteen billion, nine hundred twenty-two million, two hundred sixteen thousand, five hundred twenty".