21354410422 has 16 divisors (see below), whose sum is σ = 34270239600. Its totient is φ = 9949422240.

The previous prime is 21354410401. The next prime is 21354410443. The reversal of 21354410422 is 22401445312.

It is an interprime number because it is at equal distance from previous prime (21354410401) and next prime (21354410443).

It is a congruent number.

It is an unprimeable number.

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, 4603897 + ... + 4608532.

It is an arithmetic number, because the mean of its divisors is an integer number (2141889975).

Almost surely, 2^21354410422 is an apocalyptic number.

21354410422 is a deficient number, since it is larger than the sum of its proper divisors (12915829178).

21354410422 is a wasteful number, since it uses less digits than its factorization.

21354410422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9212511.

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 21354410422 its reverse (22401445312), we get a palindrome (43755855734).

The spelling of 21354410422 in words is "twenty-one billion, three hundred fifty-four million, four hundred ten thousand, four hundred twenty-two".