20773756623620 has 384 divisors, whose sum is σ = 60076240358400. Its totient is φ = 5823863193600.

The previous prime is 20773756623601. The next prime is 20773756623667. The reversal of 20773756623620 is 2632665737702.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 680444516 + ... + 680475044.

It is an arithmetic number, because the mean of its divisors is an integer number (156448542600).

Almost surely, 2^{20773756623620} is an apocalyptic number.

20773756623620 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 20773756623620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30038120179200).

20773756623620 is an abundant number, since it is smaller than the sum of its proper divisors (39302483734780).

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

20773756623620 is a wasteful number, since it uses less digits than its factorization.

20773756623620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31439 (or 31437 counting only the distinct ones).

The product of its (nonzero) digits is 26671680, while the sum is 56.

The spelling of 20773756623620 in words is "twenty trillion, seven hundred seventy-three billion, seven hundred fifty-six million, six hundred twenty-three thousand, six hundred twenty".