21926343 has 4 divisors (see below), whose sum is σ = 29235128. Its totient is φ = 14617560.

The previous prime is 21926341. The next prime is 21926351. The reversal of 21926343 is 34362912.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21926343 - 2¹ = 21926341 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21926343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21926341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3654388 + ... + 3654393.

It is an arithmetic number, because the mean of its divisors is an integer number (7308782).

Almost surely, 2^21926343 is an apocalyptic number.

21926343 is a deficient number, since it is larger than the sum of its proper divisors (7308785).

21926343 is an equidigital number, since it uses as much as digits as its factorization.

21926343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7308784.

The product of its digits is 7776, while the sum is 30.

The square root of 21926343 is about 4682.5573141180. The cubic root of 21926343 is about 279.8908715890.

It can be divided in two parts, 219 and 26343, that added together give a palindrome (26562).

The spelling of 21926343 in words is "twenty-one million, nine hundred twenty-six thousand, three hundred forty-three".