20442142323431 has 8 divisors (see below), whose sum is σ = 21571705518000. Its totient is φ = 19317945225600.

The previous prime is 20442142323401. The next prime is 20442142323443. The reversal of 20442142323431 is 13432324124402.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20442142323431 - 2¹⁸ = 20442142061287 is a prime.

It is a super-2 number, since 2×20442142323431² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20442142323391 and 20442142323400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20442142323401) 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, 1341516356 + ... + 1341531593.

It is an arithmetic number, because the mean of its divisors is an integer number (2696463189750).

Almost surely, 2^{20442142323431} is an apocalyptic number.

20442142323431 is a deficient number, since it is larger than the sum of its proper divisors (1129563194569).

20442142323431 is a wasteful number, since it uses less digits than its factorization.

20442142323431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2683048369.

The product of its (nonzero) digits is 110592, while the sum is 35.

Adding to 20442142323431 its reverse (13432324124402), we get a palindrome (33874466447833).

The spelling of 20442142323431 in words is "twenty trillion, four hundred forty-two billion, one hundred forty-two million, three hundred twenty-three thousand, four hundred thirty-one".