20665410311000 has 256 divisors, whose sum is σ = 61124942511360. Its totient is φ = 6363496857600.

The previous prime is 20665410310969. The next prime is 20665410311003. The reversal of 20665410311000 is 11301456602.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20665410311003) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 298184 + ... + 6435816.

It is an arithmetic number, because the mean of its divisors is an integer number (238769306685).

Almost surely, 2^{20665410311000} is an apocalyptic number.

20665410311000 is a gapful number since it is divisible by the number (20) 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 20665410311000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30562471255680).

20665410311000 is an abundant number, since it is smaller than the sum of its proper divisors (40459532200360).

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

20665410311000 is a wasteful number, since it uses less digits than its factorization.

20665410311000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6137711 (or 6137697 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

Adding to 20665410311000 its reverse (11301456602), we get a palindrome (20676711767602).

The spelling of 20665410311000 in words is "twenty trillion, six hundred sixty-five billion, four hundred ten million, three hundred eleven thousand".