20331102660 has 96 divisors (see below), whose sum is σ = 62158465152. Its totient is φ = 4924293120.

The previous prime is 20331102653. The next prime is 20331102679. The reversal of 20331102660 is 6620113302.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20331102660.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 747622 + ... + 774338.

It is an arithmetic number, because the mean of its divisors is an integer number (647484012).

Almost surely, 2^20331102660 is an apocalyptic number.

20331102660 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 20331102660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31079232576).

20331102660 is an abundant number, since it is smaller than the sum of its proper divisors (41827362492).

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

20331102660 is a wasteful number, since it uses less digits than its factorization.

20331102660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27893 (or 27891 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 20331102660 its reverse (6620113302), we get a palindrome (26951215962).

The spelling of 20331102660 in words is "twenty billion, three hundred thirty-one million, one hundred two thousand, six hundred sixty".