20660790528 has 360 divisors, whose sum is σ = 72329409152. Its totient is φ = 5742047232.

The previous prime is 20660790431. The next prime is 20660790571. The reversal of 20660790528 is 82509706602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5368701 + ... + 5372547.

Almost surely, 2^20660790528 is an apocalyptic number.

20660790528 is a gapful number since it is divisible by the number (28) 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 20660790528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36164704576).

20660790528 is an abundant number, since it is smaller than the sum of its proper divisors (51668618624).

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

20660790528 is an equidigital number, since it uses as much as digits as its factorization.

20660790528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3919 (or 3896 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The spelling of 20660790528 in words is "twenty billion, six hundred sixty million, seven hundred ninety thousand, five hundred twenty-eight".