20516207638260 has 192 divisors, whose sum is σ = 57757409240832. Its totient is φ = 5441389953024.

The previous prime is 20516207638253. The next prime is 20516207638357. The reversal of 20516207638260 is 6283670261502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 16858017172 + ... + 16858018388.

It is an arithmetic number, because the mean of its divisors is an integer number (300819839796).

Almost surely, 2^{20516207638260} is an apocalyptic number.

20516207638260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20516207638260 is an abundant number, since it is smaller than the sum of its proper divisors (37241201602572).

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

20516207638260 is a wasteful number, since it uses less digits than its factorization.

20516207638260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3202 (or 3200 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 48.

Adding to 20516207638260 its reverse (6283670261502), we get a palindrome (26799877899762).

The spelling of 20516207638260 in words is "twenty trillion, five hundred sixteen billion, two hundred seven million, six hundred thirty-eight thousand, two hundred sixty".