20649532611708 has 432 divisors, whose sum is σ = 75530926414944. Its totient is φ = 4659704340480.

The previous prime is 20649532611679. The next prime is 20649532611781. The reversal of 20649532611708 is 80711623594602.

It is a happy number.

20649532611708 is a `hidden beast` number, since 2 + 0 + 6 + 49 + 532 + 61 + 1 + 7 + 0 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1880616 + ... + 6695952.

It is an arithmetic number, because the mean of its divisors is an integer number (174840107442).

It is a 1-persistent number, because it is pandigital, but 2⋅20649532611708 = 41299065223416 is not.

Almost surely, 2^{20649532611708} is an apocalyptic number.

20649532611708 is a gapful number since it is divisible by the number (28) 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 20649532611708, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37765463207472).

20649532611708 is an abundant number, since it is smaller than the sum of its proper divisors (54881393803236).

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

20649532611708 is a wasteful number, since it uses less digits than its factorization.

20649532611708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4815402 (or 4815390 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 20649532611708 in words is "twenty trillion, six hundred forty-nine billion, five hundred thirty-two million, six hundred eleven thousand, seven hundred eight".