20102440303 has 4 divisors (see below), whose sum is σ = 21929934888. Its totient is φ = 18274945720.

The previous prime is 20102440283. The next prime is 20102440307. The reversal of 20102440303 is 30304420102.

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 20102440303 - 2⁵ = 20102440271 is a prime.

It is a super-2 number, since 2×20102440303² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102440307) 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, 913747276 + ... + 913747297.

It is an arithmetic number, because the mean of its divisors is an integer number (5482483722).

Almost surely, 2^20102440303 is an apocalyptic number.

20102440303 is a deficient number, since it is larger than the sum of its proper divisors (1827494585).

20102440303 is a wasteful number, since it uses less digits than its factorization.

20102440303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1827494584.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 20102440303 its reverse (30304420102), we get a palindrome (50406860405).

The spelling of 20102440303 in words is "twenty billion, one hundred two million, four hundred forty thousand, three hundred three".