21422302431 has 8 divisors (see below), whose sum is σ = 28647828144. Its totient is φ = 14239155840.

The previous prime is 21422302379. The next prime is 21422302453. The reversal of 21422302431 is 13420322412.

It is a happy number.

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

It is not a de Polignac number, because 21422302431 - 2¹⁸ = 21422040287 is a prime.

It is a super-2 number, since 2×21422302431² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21422302481) 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 7 ways as a sum of consecutive naturals, for example, 10593600 + ... + 10595621.

It is an arithmetic number, because the mean of its divisors is an integer number (3580978518).

Almost surely, 2^21422302431 is an apocalyptic number.

21422302431 is a deficient number, since it is larger than the sum of its proper divisors (7225525713).

21422302431 is a wasteful number, since it uses less digits than its factorization.

21422302431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21189561.

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

Adding to 21422302431 its reverse (13420322412), we get a palindrome (34842624843).

The spelling of 21422302431 in words is "twenty-one billion, four hundred twenty-two million, three hundred two thousand, four hundred thirty-one".