21343431411 has 24 divisors (see below), whose sum is σ = 31216445520. Its totient is φ = 14051434176.

The previous prime is 21343431383. The next prime is 21343431449. The reversal of 21343431411 is 11413434312.

21343431411 is a `hidden beast` number, since 2 + 1 + 343 + 4 + 314 + 1 + 1 = 666.

It is not a de Polignac number, because 21343431411 - 2⁵ = 21343431379 is a prime.

It is a super-2 number, since 2×21343431411² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21343431451) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 183985 + ... + 276653.

It is an arithmetic number, because the mean of its divisors is an integer number (1300685230).

Almost surely, 2^21343431411 is an apocalyptic number.

21343431411 is a deficient number, since it is larger than the sum of its proper divisors (9873014109).

21343431411 is a wasteful number, since it uses less digits than its factorization.

21343431411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92995 (or 92992 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

Adding to 21343431411 its reverse (11413434312), we get a palindrome (32756865723).

The spelling of 21343431411 in words is "twenty-one billion, three hundred forty-three million, four hundred thirty-one thousand, four hundred eleven".