21342411 has 24 divisors (see below), whose sum is σ = 31792176. Its totient is φ = 13790400.

The previous prime is 21342407. The next prime is 21342421. The reversal of 21342411 is 11424312.

21342411 is a `hidden beast` number, since 213 + 42 + 411 = 666.

It is not a de Polignac number, because 21342411 - 2² = 21342407 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21342421) 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, 47956 + ... + 48398.

It is an arithmetic number, because the mean of its divisors is an integer number (1324674).

Almost surely, 2^21342411 is an apocalyptic number.

21342411 is a deficient number, since it is larger than the sum of its proper divisors (10449765).

21342411 is a wasteful number, since it uses less digits than its factorization.

21342411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603 (or 600 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 21342411 is about 4619.7847352447. The cubic root of 21342411 is about 277.3838423027.

Adding to 21342411 its reverse (11424312), we get a palindrome (32766723).

It can be divided in two parts, 213 and 42411, that added together give a palindrome (42624).

The spelling of 21342411 in words is "twenty-one million, three hundred forty-two thousand, four hundred eleven".