20321710110 has 160 divisors (see below), whose sum is σ = 61943888160. Its totient is φ = 4738943232.

The previous prime is 20321710081. The next prime is 20321710163. The reversal of 20321710110 is 1101712302.

It is a happy number.

20321710110 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 149284 + ... + 250856.

It is an arithmetic number, because the mean of its divisors is an integer number (387149301).

Almost surely, 2^20321710110 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20321710110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30971944080).

20321710110 is an abundant number, since it is smaller than the sum of its proper divisors (41622178050).

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

20321710110 is a wasteful number, since it uses less digits than its factorization.

20321710110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101624 (or 101615 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 18.

The spelling of 20321710110 in words is "twenty billion, three hundred twenty-one million, seven hundred ten thousand, one hundred ten".