21346343 has 2 divisors, whose sum is σ = 21346344. Its totient is φ = 21346342.

The previous prime is 21346313. The next prime is 21346357. The reversal of 21346343 is 34364312.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21346343 - 2¹⁶ = 21280807 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21346313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10673171 + 10673172.

It is an arithmetic number, because the mean of its divisors is an integer number (10673172).

Almost surely, 2^21346343 is an apocalyptic number.

21346343 is a deficient number, since it is larger than the sum of its proper divisors (1).

21346343 is an equidigital number, since it uses as much as digits as its factorization.

21346343 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 26.

The square root of 21346343 is about 4620.2102766000. The cubic root of 21346343 is about 277.4008757781.

The spelling of 21346343 in words is "twenty-one million, three hundred forty-six thousand, three hundred forty-three".