20616574437522 has 96 divisors (see below), whose sum is σ = 51505463947392. Its totient is φ = 5837967862272.

The previous prime is 20616574437521. The next prime is 20616574437533. The reversal of 20616574437522 is 22573447561602.

20616574437522 is a `hidden beast` number, since 2 + 0 + 6 + 1 + 6 + 5 + 74 + 43 + 7 + 522 = 666.

It is not an unprimeable number, because it can be changed into a prime (20616574437521) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 313160373 + ... + 313226199.

It is an arithmetic number, because the mean of its divisors is an integer number (536515249452).

Almost surely, 2^{20616574437522} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20616574437522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25752731973696).

20616574437522 is an abundant number, since it is smaller than the sum of its proper divisors (30888889509870).

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

20616574437522 is a wasteful number, since it uses less digits than its factorization.

20616574437522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87952 (or 87949 counting only the distinct ones).

The product of its (nonzero) digits is 16934400, while the sum is 54.

The spelling of 20616574437522 in words is "twenty trillion, six hundred sixteen billion, five hundred seventy-four million, four hundred thirty-seven thousand, five hundred twenty-two".