20001020303 has 4 divisors (see below), whose sum is σ = 21819294888. Its totient is φ = 18182745720.

The previous prime is 20001020279. The next prime is 20001020311. The reversal of 20001020303 is 30302010002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20001020303 - 2¹⁰ = 20001019279 is a prime.

It is a super-2 number, since 2×20001020303² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (11), and also a Moran number because the ratio is a prime number: 1818274573 = 20001020303 / (2 + 0 + 0 + 0 + 1 + 0 + 2 + 0 + 3 + 0 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001020383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 909137276 + ... + 909137297.

It is an arithmetic number, because the mean of its divisors is an integer number (5454823722).

Almost surely, 2^20001020303 is an apocalyptic number.

20001020303 is a deficient number, since it is larger than the sum of its proper divisors (1818274585).

20001020303 is a wasteful number, since it uses less digits than its factorization.

20001020303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1818274584.

The product of its (nonzero) digits is 36, while the sum is 11.

Adding to 20001020303 its reverse (30302010002), we get a palindrome (50303030305).

The spelling of 20001020303 in words is "twenty billion, one million, twenty thousand, three hundred three".