20431401111 has 48 divisors (see below), whose sum is σ = 32736706080. Its totient is φ = 12175349760.

The previous prime is 20431401079. The next prime is 20431401121. The reversal of 20431401111 is 11110413402.

It is not a de Polignac number, because 20431401111 - 2⁵ = 20431401079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20431401121) 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 47 ways as a sum of consecutive naturals, for example, 2431305 + ... + 2439693.

It is an arithmetic number, because the mean of its divisors is an integer number (682014710).

Almost surely, 2^20431401111 is an apocalyptic number.

20431401111 is a deficient number, since it is larger than the sum of its proper divisors (12305304969).

20431401111 is a wasteful number, since it uses less digits than its factorization.

20431401111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8816 (or 8813 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 20431401111 its reverse (11110413402), we get a palindrome (31541814513).

The spelling of 20431401111 in words is "twenty billion, four hundred thirty-one million, four hundred one thousand, one hundred eleven".