20143240424231 has 16 divisors (see below), whose sum is σ = 21722958172800. Its totient is φ = 18610166035968.

The previous prime is 20143240424207. The next prime is 20143240424273. The reversal of 20143240424231 is 13242404234102.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20143240424231 is a prime.

It is a super-2 number, since 2×20143240424231² (a number of 27 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 (20143240424731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43116476 + ... + 43581153.

It is an arithmetic number, because the mean of its divisors is an integer number (1357684885800).

Almost surely, 2^{20143240424231} is an apocalyptic number.

20143240424231 is a deficient number, since it is larger than the sum of its proper divisors (1579717748569).

20143240424231 is a wasteful number, since it uses less digits than its factorization.

20143240424231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86697898.

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 20143240424231 its reverse (13242404234102), we get a palindrome (33385644658333).

The spelling of 20143240424231 in words is "twenty trillion, one hundred forty-three billion, two hundred forty million, four hundred twenty-four thousand, two hundred thirty-one".