20555759279820 has 96 divisors (see below), whose sum is σ = 60060023493120. Its totient is φ = 5243080944640.

The previous prime is 20555759279801. The next prime is 20555759279833. The reversal of 20555759279820 is 2897295755502.

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, 65311591 + ... + 65625569.

It is an arithmetic number, because the mean of its divisors is an integer number (625625244720).

Almost surely, 2^{20555759279820} is an apocalyptic number.

20555759279820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20555759279820 is an abundant number, since it is smaller than the sum of its proper divisors (39504264213300).

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

20555759279820 is a wasteful number, since it uses less digits than its factorization.

20555759279820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361455 (or 361453 counting only the distinct ones).

The product of its (nonzero) digits is 158760000, while the sum is 66.

The spelling of 20555759279820 in words is "twenty trillion, five hundred fifty-five billion, seven hundred fifty-nine million, two hundred seventy-nine thousand, eight hundred twenty".