20877523355520 has 1280 divisors, whose sum is σ = 82663838832960. Its totient is φ = 4988583936000.

The previous prime is 20877523355489. The next prime is 20877523355603. The reversal of 20877523355520 is 2555332577802.

20877523355520 is a `hidden beast` number, since 2 + 0 + 8 + 7 + 7 + 52 + 3 + 35 + 552 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 5830080130 + ... + 5830083710.

Almost surely, 2^{20877523355520} is an apocalyptic number.

20877523355520 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 20877523355520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41331919416480).

20877523355520 is an abundant number, since it is smaller than the sum of its proper divisors (61786315477440).

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

20877523355520 is a wasteful number, since it uses less digits than its factorization.

20877523355520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3877 (or 3856 counting only the distinct ones).

The product of its (nonzero) digits is 17640000, while the sum is 54.

The spelling of 20877523355520 in words is "twenty trillion, eight hundred seventy-seven billion, five hundred twenty-three million, three hundred fifty-five thousand, five hundred twenty".