21343141305 has 16 divisors (see below), whose sum is σ = 37943362560. Its totient is φ = 11383008624.

The previous prime is 21343141301. The next prime is 21343141321. The reversal of 21343141305 is 50314134312.

It is a happy number.

21343141305 is a `hidden beast` number, since 2 + 1 + 343 + 14 + 1 + 305 = 666.

It is not a de Polignac number, because 21343141305 - 2² = 21343141301 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (21343141301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79048537 + ... + 79048806.

It is an arithmetic number, because the mean of its divisors is an integer number (2371460160).

Almost surely, 2^21343141305 is an apocalyptic number.

It is an amenable number.

21343141305 is a deficient number, since it is larger than the sum of its proper divisors (16600221255).

21343141305 is a wasteful number, since it uses less digits than its factorization.

21343141305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158097357 (or 158097351 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 21343141305 its reverse (50314134312), we get a palindrome (71657275617).

The spelling of 21343141305 in words is "twenty-one billion, three hundred forty-three million, one hundred forty-one thousand, three hundred five".