20001203102320 has 160 divisors (see below), whose sum is σ = 53807576826816. Its totient is φ = 6833464934400.

The previous prime is 20001203102281. The next prime is 20001203102323. The reversal of 20001203102320 is 2320130210002.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 20001203102294 and 20001203102303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001203102323) 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, 7473360 + ... + 9790480.

Almost surely, 2^{20001203102320} is an apocalyptic number.

20001203102320 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 20001203102320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26903788413408).

20001203102320 is an abundant number, since it is smaller than the sum of its proper divisors (33806373724496).

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

20001203102320 is a wasteful number, since it uses less digits than its factorization.

20001203102320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2317739 (or 2317733 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 20001203102320 its reverse (2320130210002), we get a palindrome (22321333312322).

The spelling of 20001203102320 in words is "twenty trillion, one billion, two hundred three million, one hundred two thousand, three hundred twenty".