20012103203220 has 72 divisors (see below), whose sum is σ = 60703927163880. Its totient is φ = 5336512727040.

The previous prime is 20012103203177. The next prime is 20012103203303. The reversal of 20012103203220 is 2230230121002.

20012103203220 is a `hidden beast` number, since 2 + 0 + 0 + 1 + 21 + 0 + 320 + 322 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4262523609744 + 15749579593476 = 2064588^2 + 3968574^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 20012103203193 and 20012103203202.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 22415136 + ... + 23290824.

Almost surely, 2^{20012103203220} is an apocalyptic number.

20012103203220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20012103203220 is an abundant number, since it is smaller than the sum of its proper divisors (40691823960660).

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

20012103203220 is a wasteful number, since it uses less digits than its factorization.

20012103203220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1002665 (or 1002660 counting only the distinct ones).

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

Adding to 20012103203220 its reverse (2230230121002), we get a palindrome (22242333324222).

The spelling of 20012103203220 in words is "twenty trillion, twelve billion, one hundred three million, two hundred three thousand, two hundred twenty".