20538833388606 has 192 divisors, whose sum is σ = 51282787203648. Its totient is φ = 5884665790464.

The previous prime is 20538833388553. The next prime is 20538833388637. The reversal of 20538833388606 is 60688333883502.

20538833388606 is a `hidden beast` number, since 2 + 0 + 538 + 8 + 3 + 3 + 38 + 8 + 60 + 6 = 666.

It is a super-2 number, since 2×20538833388606² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1544614950 + ... + 1544628246.

It is an arithmetic number, because the mean of its divisors is an integer number (267097850019).

Almost surely, 2^{20538833388606} is an apocalyptic number.

20538833388606 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 20538833388606, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25641393601824).

20538833388606 is an abundant number, since it is smaller than the sum of its proper divisors (30743953815042).

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

20538833388606 is a wasteful number, since it uses less digits than its factorization.

20538833388606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17435 (or 17432 counting only the distinct ones).

The product of its (nonzero) digits is 119439360, while the sum is 63.

The spelling of 20538833388606 in words is "twenty trillion, five hundred thirty-eight billion, eight hundred thirty-three million, three hundred eighty-eight thousand, six hundred six".