20431320541 has 8 divisors (see below), whose sum is σ = 20789212064. Its totient is φ = 20074169520.

The previous prime is 20431320493. The next prime is 20431320563. The reversal of 20431320541 is 14502313402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20431320541 - 2⁹ = 20431320029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20431323541) 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 7 ways as a sum of consecutive naturals, for example, 129315 + ... + 239968.

It is an arithmetic number, because the mean of its divisors is an integer number (2598651508).

Almost surely, 2^20431320541 is an apocalyptic number.

It is an amenable number.

20431320541 is a deficient number, since it is larger than the sum of its proper divisors (357891523).

20431320541 is an equidigital number, since it uses as much as digits as its factorization.

20431320541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370251.

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 20431320541 its reverse (14502313402), we get a palindrome (34933633943).

The spelling of 20431320541 in words is "twenty billion, four hundred thirty-one million, three hundred twenty thousand, five hundred forty-one".