20431130263 has 4 divisors (see below), whose sum is σ = 20438010088. Its totient is φ = 20424250440.

The previous prime is 20431130231. The next prime is 20431130297. The reversal of 20431130263 is 36203113402.

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 20431130263 - 2⁵ = 20431130231 is a prime.

It is a super-3 number, since 3×20431130263³ (a number of 32 digits) contains 333 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 (20431130563) 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, 3435456 + ... + 3441397.

It is an arithmetic number, because the mean of its divisors is an integer number (5109502522).

Almost surely, 2^20431130263 is an apocalyptic number.

20431130263 is a deficient number, since it is larger than the sum of its proper divisors (6879825).

20431130263 is an equidigital number, since it uses as much as digits as its factorization.

20431130263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6879824.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 20431130263 its reverse (36203113402), we get a palindrome (56634243665).

The spelling of 20431130263 in words is "twenty billion, four hundred thirty-one million, one hundred thirty thousand, two hundred sixty-three".