20908957829592 has 256 divisors, whose sum is σ = 64030694400000. Its totient is φ = 5561162772480.

The previous prime is 20908957829549. The next prime is 20908957829593. The reversal of 20908957829592 is 29592875980902.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20908957829593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 40370284 + ... + 40884932.

It is an arithmetic number, because the mean of its divisors is an integer number (250119900000).

Almost surely, 2^{20908957829592} 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 20908957829592, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32015347200000).

20908957829592 is an abundant number, since it is smaller than the sum of its proper divisors (43121736570408).

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

20908957829592 is a wasteful number, since it uses less digits than its factorization.

20908957829592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514994 (or 514990 counting only the distinct ones).

The product of its (nonzero) digits is 587865600, while the sum is 75.

The spelling of 20908957829592 in words is "twenty trillion, nine hundred eight billion, nine hundred fifty-seven million, eight hundred twenty-nine thousand, five hundred ninety-two".