21313422423431 has 4 divisors (see below), whose sum is σ = 21322824023592. Its totient is φ = 21304020823272.

The previous prime is 21313422423401. The next prime is 21313422423439. The reversal of 21313422423431 is 13432422431312.

It is a happy number.

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 21313422423431 - 2³⁰ = 21312348681607 is a prime.

It is a super-2 number, since 2×21313422423431² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21313422423391 and 21313422423400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21313422423439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4700796680 + ... + 4700801213.

It is an arithmetic number, because the mean of its divisors is an integer number (5330706005898).

Almost surely, 2^{21313422423431} is an apocalyptic number.

21313422423431 is a deficient number, since it is larger than the sum of its proper divisors (9401600161).

21313422423431 is an equidigital number, since it uses as much as digits as its factorization.

21313422423431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9401600160.

The product of its digits is 82944, while the sum is 35.

Adding to 21313422423431 its reverse (13432422431312), we get a palindrome (34745844854743).

The spelling of 21313422423431 in words is "twenty-one trillion, three hundred thirteen billion, four hundred twenty-two million, four hundred twenty-three thousand, four hundred thirty-one".