21332342511 has 24 divisors (see below), whose sum is σ = 33481443840. Its totient is φ = 13038440400.

The previous prime is 21332342503. The next prime is 21332342531. The reversal of 21332342511 is 11524323312.

21332342511 is a `hidden beast` number, since 213 + 3 + 23 + 425 + 1 + 1 = 666.

It is not a de Polignac number, because 21332342511 - 2³ = 21332342503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21332342531) 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, 2006805 + ... + 2017406.

It is an arithmetic number, because the mean of its divisors is an integer number (1395060160).

Almost surely, 2^21332342511 is an apocalyptic number.

21332342511 is a deficient number, since it is larger than the sum of its proper divisors (12149101329).

21332342511 is a wasteful number, since it uses less digits than its factorization.

21332342511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4024267 (or 4024264 counting only the distinct ones).

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

Adding to 21332342511 its reverse (11524323312), we get a palindrome (32856665823).

The spelling of 21332342511 in words is "twenty-one billion, three hundred thirty-two million, three hundred forty-two thousand, five hundred eleven".