20545301216 has 48 divisors (see below), whose sum is σ = 44684317440. Its totient is φ = 9220548480.

The previous prime is 20545301197. The next prime is 20545301219. The reversal of 20545301216 is 61210354502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20545301219) 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, 341606 + ... + 397221.

It is an arithmetic number, because the mean of its divisors is an integer number (930923280).

Almost surely, 2^20545301216 is an apocalyptic number.

It is an amenable number.

20545301216 is an abundant number, since it is smaller than the sum of its proper divisors (24139016224).

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

20545301216 is a wasteful number, since it uses less digits than its factorization.

20545301216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738927 (or 738919 counting only the distinct ones).

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

Adding to 20545301216 its reverse (61210354502), we get a palindrome (81755655718).

The spelling of 20545301216 in words is "twenty billion, five hundred forty-five million, three hundred one thousand, two hundred sixteen".