20431140342 has 16 divisors (see below), whose sum is σ = 41633267760. Its totient is φ = 6681882272.

The previous prime is 20431140313. The next prime is 20431140343. The reversal of 20431140342 is 24304113402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20431140343) 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, 32124117 + ... + 32124752.

It is an arithmetic number, because the mean of its divisors is an integer number (2602079235).

Almost surely, 2^20431140342 is an apocalyptic number.

20431140342 is an abundant number, since it is smaller than the sum of its proper divisors (21202127418).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20431140342 is a wasteful number, since it uses less digits than its factorization.

20431140342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64248927.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 20431140342 its reverse (24304113402), we get a palindrome (44735253744).

The spelling of 20431140342 in words is "twenty billion, four hundred thirty-one million, one hundred forty thousand, three hundred forty-two".