20561976711360 has 336 divisors, whose sum is σ = 80853226249536. Its totient is φ = 4698422378496.

The previous prime is 20561976711347. The next prime is 20561976711421. The reversal of 20561976711360 is 6311767916502.

20561976711360 is a `hidden beast` number, since 2 + 0 + 5 + 619 + 7 + 6 + 7 + 1 + 13 + 6 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (336).

It is a super-2 number, since 2×20561976711360² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20561976711297 and 20561976711306.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 65504544 + ... + 65817696.

Almost surely, 2^{20561976711360} is an apocalyptic number.

20561976711360 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 20561976711360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40426613124768).

20561976711360 is an abundant number, since it is smaller than the sum of its proper divisors (60291249538176).

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

20561976711360 is a wasteful number, since it uses less digits than its factorization.

20561976711360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316440 (or 316427 counting only the distinct ones).

The product of its (nonzero) digits is 2857680, while the sum is 54.

The spelling of 20561976711360 in words is "twenty trillion, five hundred sixty-one billion, nine hundred seventy-six million, seven hundred eleven thousand, three hundred sixty".