21342005235 has 48 divisors (see below), whose sum is σ = 38753020800. Its totient is φ = 10850740992.

The previous prime is 21342005231. The next prime is 21342005249. The reversal of 21342005235 is 53250024312.

It is a happy number.

21342005235 is a `hidden beast` number, since 2 + 1 + 3 + 420 + 0 + 5 + 235 = 666.

It is not a de Polignac number, because 21342005235 - 2² = 21342005231 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21342005199 and 21342005208.

It is not an unprimeable number, because it can be changed into a prime (21342005231) 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 47 ways as a sum of consecutive naturals, for example, 412 + ... + 206601.

It is an arithmetic number, because the mean of its divisors is an integer number (807354600).

Almost surely, 2^21342005235 is an apocalyptic number.

21342005235 is a deficient number, since it is larger than the sum of its proper divisors (17411015565).

21342005235 is a wasteful number, since it uses less digits than its factorization.

21342005235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207132 (or 207129 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

Adding to 21342005235 its reverse (53250024312), we get a palindrome (74592029547).

The spelling of 21342005235 in words is "twenty-one billion, three hundred forty-two million, five thousand, two hundred thirty-five".