20111140431 has 8 divisors (see below), whose sum is σ = 29794282160. Its totient is φ = 13407426936.

The previous prime is 20111140421. The next prime is 20111140481. The reversal of 20111140431 is 13404111102.

It is not a de Polignac number, because 20111140431 - 2⁶ = 20111140367 is a prime.

It is a super-3 number, since 3×20111140431³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111140411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 372428500 + ... + 372428553.

It is an arithmetic number, because the mean of its divisors is an integer number (3724285270).

Almost surely, 2^20111140431 is an apocalyptic number.

20111140431 is a deficient number, since it is larger than the sum of its proper divisors (9683141729).

20111140431 is an equidigital number, since it uses as much as digits as its factorization.

20111140431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744857062 (or 744857056 counting only the distinct ones).

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

Adding to 20111140431 its reverse (13404111102), we get a palindrome (33515251533).

The spelling of 20111140431 in words is "twenty billion, one hundred eleven million, one hundred forty thousand, four hundred thirty-one".