20010655919520 has 864 divisors, whose sum is σ = 82701368934912. Its totient is φ = 4314985095168.

The previous prime is 20010655919473. The next prime is 20010655919521. The reversal of 20010655919520 is 2591955601002.

20010655919520 is a `hidden beast` number, since 2 + 0 + 0 + 1 + 0 + 6 + 5 + 591 + 9 + 52 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (20010655919521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 389233657 + ... + 389285063.

It is an arithmetic number, because the mean of its divisors is an integer number (95719177008).

Almost surely, 2^{20010655919520} is an apocalyptic number.

20010655919520 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 20010655919520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41350684467456).

20010655919520 is an abundant number, since it is smaller than the sum of its proper divisors (62690713015392).

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

20010655919520 is a wasteful number, since it uses less digits than its factorization.

20010655919520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51554 (or 51520 counting only the distinct ones).

The product of its (nonzero) digits is 243000, while the sum is 45.

The spelling of 20010655919520 in words is "twenty trillion, ten billion, six hundred fifty-five million, nine hundred nineteen thousand, five hundred twenty".