20555682273280 has 1152 divisors, whose sum is σ = 63915853921920. Its totient is φ = 6207779635200.

The previous prime is 20555682273263. The next prime is 20555682273341. The reversal of 20555682273280 is 8237228655502.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 44589332250 + ... + 44589332710.

It is an arithmetic number, because the mean of its divisors is an integer number (55482512085).

Almost surely, 2^{20555682273280} is an apocalyptic number.

20555682273280 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 20555682273280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31957926960960).

20555682273280 is an abundant number, since it is smaller than the sum of its proper divisors (43360171648640).

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

20555682273280 is a wasteful number, since it uses less digits than its factorization.

20555682273280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667 (or 636 counting only the distinct ones).

The product of its (nonzero) digits is 16128000, while the sum is 55.

The spelling of 20555682273280 in words is "twenty trillion, five hundred fifty-five billion, six hundred eighty-two million, two hundred seventy-three thousand, two hundred eighty".