20203012221320 has 16 divisors (see below), whose sum is σ = 45456777498060. Its totient is φ = 8081204888512.

The previous prime is 20203012221209. The next prime is 20203012221323. The reversal of 20203012221320 is 2312221030202.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18855030848644 + 1347981372676 = 4342238^2 + 1161026^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 20203012221292 and 20203012221301.

It is not an unprimeable number, because it can be changed into a prime (20203012221323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252537652727 + ... + 252537652806.

Almost surely, 2^{20203012221320} is an apocalyptic number.

20203012221320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20203012221320 is an abundant number, since it is smaller than the sum of its proper divisors (25253765276740).

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

20203012221320 is a wasteful number, since it uses less digits than its factorization.

20203012221320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505075305544 (or 505075305540 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 20203012221320 its reverse (2312221030202), we get a palindrome (22515233251522).

The spelling of 20203012221320 in words is "twenty trillion, two hundred three billion, twelve million, two hundred twenty-one thousand, three hundred twenty".