20502220170 has 64 divisors (see below), whose sum is σ = 50097079296. Its totient is φ = 5368481280.

The previous prime is 20502220159. The next prime is 20502220181. The reversal of 20502220170 is 7102220502.

It is a happy number.

20502220170 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (20502220159) and next prime (20502220181).

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, 1101582 + ... + 1120038.

It is an arithmetic number, because the mean of its divisors is an integer number (782766864).

Almost surely, 2^20502220170 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20502220170, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25048539648).

20502220170 is an abundant number, since it is smaller than the sum of its proper divisors (29594859126).

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

20502220170 is a wasteful number, since it uses less digits than its factorization.

20502220170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19135.

The product of its (nonzero) digits is 560, while the sum is 21.

Adding to 20502220170 its reverse (7102220502), we get a palindrome (27604440672).

The spelling of 20502220170 in words is "twenty billion, five hundred two million, two hundred twenty thousand, one hundred seventy".