20412111431 has 4 divisors (see below), whose sum is σ = 20421638592. Its totient is φ = 20402584272.

The previous prime is 20412111383. The next prime is 20412111509. The reversal of 20412111431 is 13411121402.

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 20412111431 - 2¹⁸ = 20411849287 is a prime.

It is a super-2 number, since 2×20412111431² (a number of 21 digits) contains 22 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 (20412111631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4760366 + ... + 4764651.

It is an arithmetic number, because the mean of its divisors is an integer number (5105409648).

Almost surely, 2^20412111431 is an apocalyptic number.

20412111431 is a deficient number, since it is larger than the sum of its proper divisors (9527161).

20412111431 is an equidigital number, since it uses as much as digits as its factorization.

20412111431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9527160.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 20412111431 its reverse (13411121402), we get a palindrome (33823232833).

The spelling of 20412111431 in words is "twenty billion, four hundred twelve million, one hundred eleven thousand, four hundred thirty-one".