20532505512 has 64 divisors (see below), whose sum is σ = 52282641600. Its totient is φ = 6717680640.

The previous prime is 20532505489. The next prime is 20532505523. The reversal of 20532505512 is 21550523502.

It is a self number, because there is not a number n which added to its sum of digits gives 20532505512.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 925008 + ... + 946944.

It is an arithmetic number, because the mean of its divisors is an integer number (816916275).

Almost surely, 2^20532505512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20532505512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26141320800).

20532505512 is an abundant number, since it is smaller than the sum of its proper divisors (31750136088).

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

20532505512 is a wasteful number, since it uses less digits than its factorization.

20532505512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22666 (or 22662 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 30.

The spelling of 20532505512 in words is "twenty billion, five hundred thirty-two million, five hundred five thousand, five hundred twelve".