20500516064 has 48 divisors (see below), whose sum is σ = 46151532000. Its totient is φ = 8781103104.

The previous prime is 20500515989. The next prime is 20500516079. The reversal of 20500516064 is 46061500502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 398912 + ... + 447360.

It is an arithmetic number, because the mean of its divisors is an integer number (961490250).

Almost surely, 2^20500516064 is an apocalyptic number.

It is an amenable number.

20500516064 is an abundant number, since it is smaller than the sum of its proper divisors (25651015936).

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

20500516064 is a wasteful number, since it uses less digits than its factorization.

20500516064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50355 (or 50347 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The spelling of 20500516064 in words is "twenty billion, five hundred million, five hundred sixteen thousand, sixty-four".