20826601620580 has 96 divisors (see below), whose sum is σ = 50177977420032. Its totient is φ = 7112848550400.

The previous prime is 20826601620571. The next prime is 20826601620611. The reversal of 20826601620580 is 8502610662802.

It is a self number, because there is not a number n which added to its sum of digits gives 20826601620580.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61118875 + ... + 61458685.

It is an arithmetic number, because the mean of its divisors is an integer number (522687264792).

Almost surely, 2^{20826601620580} is an apocalyptic number.

20826601620580 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 20826601620580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25088988710016).

20826601620580 is an abundant number, since it is smaller than the sum of its proper divisors (29351375799452).

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

20826601620580 is a wasteful number, since it uses less digits than its factorization.

20826601620580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341525 (or 341523 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 46.

The spelling of 20826601620580 in words is "twenty trillion, eight hundred twenty-six billion, six hundred one million, six hundred twenty thousand, five hundred eighty".