20541431003 has 4 divisors (see below), whose sum is σ = 21249756240. Its totient is φ = 19833105768.

The previous prime is 20541430991. The next prime is 20541431011. The reversal of 20541431003 is 30013414502.

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 20541431003 - 2³² = 16246463707 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20541431003.

It is not an unprimeable number, because it can be changed into a prime (20541431023) 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 3 ways as a sum of consecutive naturals, for example, 354162575 + ... + 354162632.

It is an arithmetic number, because the mean of its divisors is an integer number (5312439060).

Almost surely, 2^20541431003 is an apocalyptic number.

20541431003 is a deficient number, since it is larger than the sum of its proper divisors (708325237).

20541431003 is an equidigital number, since it uses as much as digits as its factorization.

20541431003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708325236.

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 20541431003 its reverse (30013414502), we get a palindrome (50554845505).

The spelling of 20541431003 in words is "twenty billion, five hundred forty-one million, four hundred thirty-one thousand, three".