20403303011 has 48 divisors (see below), whose sum is σ = 25835741568. Its totient is φ = 15970348800.

The previous prime is 20403302923. The next prime is 20403303043. The reversal of 20403303011 is 11030330402.

It is a happy number.

It is not a de Polignac number, because 20403303011 - 2²⁶ = 20336194147 is a prime.

It is a super-2 number, since 2×20403303011² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20403302011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 31245161 + ... + 31245813.

It is an arithmetic number, because the mean of its divisors is an integer number (538244616).

Almost surely, 2^20403303011 is an apocalyptic number.

20403303011 is a deficient number, since it is larger than the sum of its proper divisors (5432438557).

20403303011 is a wasteful number, since it uses less digits than its factorization.

20403303011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1132 (or 1125 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 20403303011 its reverse (11030330402), we get a palindrome (31433633413).

The spelling of 20403303011 in words is "twenty billion, four hundred three million, three hundred three thousand, eleven".