20502311002320 has 160 divisors (see below), whose sum is σ = 73556212101120. Its totient is φ = 4626922959360.

The previous prime is 20502311002297. The next prime is 20502311002321. The reversal of 20502311002320 is 2320011320502.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20502311002321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77106246 + ... + 77371685.

It is an arithmetic number, because the mean of its divisors is an integer number (459726325632).

Almost surely, 2^{20502311002320} is an apocalyptic number.

20502311002320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20502311002320 is an abundant number, since it is smaller than the sum of its proper divisors (53053901098800).

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

20502311002320 is a wasteful number, since it uses less digits than its factorization.

20502311002320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154478033 (or 154478027 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 20502311002320 its reverse (2320011320502), we get a palindrome (22822322322822).

The spelling of 20502311002320 in words is "twenty trillion, five hundred two billion, three hundred eleven million, two thousand, three hundred twenty".