20512216652 has 6 divisors (see below), whose sum is σ = 35896379148. Its totient is φ = 10256108324.

The previous prime is 20512216639. The next prime is 20512216657. The reversal of 20512216652 is 25661221502.

It is not an unprimeable number, because it can be changed into a prime (20512216657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2564027078 + ... + 2564027085.

It is an arithmetic number, because the mean of its divisors is an integer number (5982729858).

Almost surely, 2^20512216652 is an apocalyptic number.

It is an amenable number.

20512216652 is a deficient number, since it is larger than the sum of its proper divisors (15384162496).

20512216652 is a wasteful number, since it uses less digits than its factorization.

20512216652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5128054167 (or 5128054165 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The spelling of 20512216652 in words is "twenty billion, five hundred twelve million, two hundred sixteen thousand, six hundred fifty-two".