21232305342 has 24 divisors (see below), whose sum is σ = 46200776544. Its totient is φ = 7047058464.

The previous prime is 21232305323. The next prime is 21232305371. The reversal of 21232305342 is 24350323212.

21232305342 is a `hidden beast` number, since 2 + 12 + 3 + 2 + 305 + 342 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2527078 + ... + 2535465.

It is an arithmetic number, because the mean of its divisors is an integer number (1925032356).

Almost surely, 2^21232305342 is an apocalyptic number.

21232305342 is an abundant number, since it is smaller than the sum of its proper divisors (24968471202).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21232305342 is a wasteful number, since it uses less digits than its factorization.

21232305342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5062784 (or 5062781 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

Adding to 21232305342 its reverse (24350323212), we get a palindrome (45582628554).

The spelling of 21232305342 in words is "twenty-one billion, two hundred thirty-two million, three hundred five thousand, three hundred forty-two".