20203021103202 has 144 divisors (see below), whose sum is σ = 50809282497792. Its totient is φ = 5683345430400.

The previous prime is 20203021103197. The next prime is 20203021103231. The reversal of 20203021103202 is 20230112030202.

20203021103202 is a `hidden beast` number, since 20 + 20 + 302 + 1 + 1 + 0 + 320 + 2 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1329750918 + ... + 1329766110.

It is an arithmetic number, because the mean of its divisors is an integer number (352842239568).

Almost surely, 2^{20203021103202} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20203021103202, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25404641248896).

20203021103202 is an abundant number, since it is smaller than the sum of its proper divisors (30606261394590).

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

20203021103202 is a wasteful number, since it uses less digits than its factorization.

20203021103202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17693 (or 17623 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 20203021103202 its reverse (20230112030202), we get a palindrome (40433133133404).

The spelling of 20203021103202 in words is "twenty trillion, two hundred three billion, twenty-one million, one hundred three thousand, two hundred two".