20726971510740 has 384 divisors, whose sum is σ = 66751746969600. Its totient is φ = 4756477440000.

The previous prime is 20726971510681. The next prime is 20726971510741. The reversal of 20726971510740 is 4701517962702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20726971510741) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 598180936 + ... + 598215584.

It is an arithmetic number, because the mean of its divisors is an integer number (173832674400).

Almost surely, 2^{20726971510740} is an apocalyptic number.

20726971510740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20726971510740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33375873484800).

20726971510740 is an abundant number, since it is smaller than the sum of its proper divisors (46024775458860).

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

20726971510740 is a wasteful number, since it uses less digits than its factorization.

20726971510740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35103 (or 35101 counting only the distinct ones).

The product of its (nonzero) digits is 1481760, while the sum is 51.

The spelling of 20726971510740 in words is "twenty trillion, seven hundred twenty-six billion, nine hundred seventy-one million, five hundred ten thousand, seven hundred forty".