20303111031 has 16 divisors (see below), whose sum is σ = 31257026304. Its totient is φ = 11482170624.

The previous prime is 20303111021. The next prime is 20303111119. The reversal of 20303111031 is 13011130302.

It is not a de Polignac number, because 20303111031 - 2⁶ = 20303110967 is a prime.

It is a super-2 number, since 2×20303111031² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20303111031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20303111021) 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 15 ways as a sum of consecutive naturals, for example, 4981545 + ... + 4985618.

It is an arithmetic number, because the mean of its divisors is an integer number (1953564144).

Almost surely, 2^20303111031 is an apocalyptic number.

20303111031 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20303111031 is a deficient number, since it is larger than the sum of its proper divisors (10953915273).

20303111031 is an equidigital number, since it uses as much as digits as its factorization.

20303111031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9967270.

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 20303111031 its reverse (13011130302), we get a palindrome (33314241333).

The spelling of 20303111031 in words is "twenty billion, three hundred three million, one hundred eleven thousand, thirty-one".