20556506534124 has 192 divisors, whose sum is σ = 54884487168000. Its totient is φ = 5931442944000.

The previous prime is 20556506534107. The next prime is 20556506534149. The reversal of 20556506534124 is 42143560565502.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 144904572 + ... + 145046364.

It is an arithmetic number, because the mean of its divisors is an integer number (285856704000).

Almost surely, 2^{20556506534124} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20556506534124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27442243584000).

20556506534124 is an abundant number, since it is smaller than the sum of its proper divisors (34327980633876).

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

20556506534124 is a wasteful number, since it uses less digits than its factorization.

20556506534124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142412 (or 142410 counting only the distinct ones).

The product of its (nonzero) digits is 4320000, while the sum is 48.

The spelling of 20556506534124 in words is "twenty trillion, five hundred fifty-six billion, five hundred six million, five hundred thirty-four thousand, one hundred twenty-four".