20021113203 has 24 divisors (see below), whose sum is σ = 33441862608. Its totient is φ = 10560586176.

The previous prime is 20021113127. The next prime is 20021113207. The reversal of 20021113203 is 30231112002.

It is not a de Polignac number, because 20021113203 - 2⁹ = 20021112691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20021113207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5236476 + ... + 5240297.

It is an arithmetic number, because the mean of its divisors is an integer number (1393410942).

Almost surely, 2^20021113203 is an apocalyptic number.

20021113203 is a deficient number, since it is larger than the sum of its proper divisors (13420749405).

20021113203 is a wasteful number, since it uses less digits than its factorization.

20021113203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10476803 (or 10476796 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20021113203 its reverse (30231112002), we get a palindrome (50252225205).

The spelling of 20021113203 in words is "twenty billion, twenty-one million, one hundred thirteen thousand, two hundred three".