21341400343 has 16 divisors (see below), whose sum is σ = 23063356800. Its totient is φ = 19685147040.

The previous prime is 21341400341. The next prime is 21341400349. The reversal of 21341400343 is 34300414312.

It is a cyclic number.

It is not a de Polignac number, because 21341400343 - 2¹ = 21341400341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21341400341) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 51028 + ... + 212806.

It is an arithmetic number, because the mean of its divisors is an integer number (1441459800).

Almost surely, 2^21341400343 is an apocalyptic number.

21341400343 is a deficient number, since it is larger than the sum of its proper divisors (1721956457).

21341400343 is a wasteful number, since it uses less digits than its factorization.

21341400343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161982.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21341400343 its reverse (34300414312), we get a palindrome (55641814655).

The spelling of 21341400343 in words is "twenty-one billion, three hundred forty-one million, four hundred thousand, three hundred forty-three".