20090856760728 has 256 divisors, whose sum is σ = 56847793766400. Its totient is φ = 5870616998400.

The previous prime is 20090856760693. The next prime is 20090856760771. The reversal of 20090856760728 is 82706765809002.

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, 2534480301 + ... + 2534488227.

It is an arithmetic number, because the mean of its divisors is an integer number (222061694400).

Almost surely, 2^{20090856760728} 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 20090856760728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28423896883200).

20090856760728 is an abundant number, since it is smaller than the sum of its proper divisors (36756937005672).

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

20090856760728 is a wasteful number, since it uses less digits than its factorization.

20090856760728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10462 (or 10458 counting only the distinct ones).

The product of its (nonzero) digits is 20321280, while the sum is 60.

The spelling of 20090856760728 in words is "twenty trillion, ninety billion, eight hundred fifty-six million, seven hundred sixty thousand, seven hundred twenty-eight".