20662560426546 has 128 divisors (see below), whose sum is σ = 48143766528000. Its totient is φ = 6560402925888.

The previous prime is 20662560426523. The next prime is 20662560426553. The reversal of 20662560426546 is 64562406526602.

20662560426546 is a `hidden beast` number, since 2 + 0 + 6 + 6 + 2 + 5 + 604 + 26 + 5 + 4 + 6 = 666.

It is a super-2 number, since 2×20662560426546² (a number of 27 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 20662560426492 and 20662560426501.

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, 42177835 + ... + 42664913.

It is an arithmetic number, because the mean of its divisors is an integer number (376123176000).

Almost surely, 2^{20662560426546} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20662560426546, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24071883264000).

20662560426546 is an abundant number, since it is smaller than the sum of its proper divisors (27481206101454).

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

20662560426546 is a wasteful number, since it uses less digits than its factorization.

20662560426546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487485 (or 487479 counting only the distinct ones).

The product of its (nonzero) digits is 24883200, while the sum is 54.

The spelling of 20662560426546 in words is "twenty trillion, six hundred sixty-two billion, five hundred sixty million, four hundred twenty-six thousand, five hundred forty-six".