21430230342 has 16 divisors (see below), whose sum is σ = 42921610992. Its totient is φ = 7133218400.

The previous prime is 21430230319. The next prime is 21430230361. The reversal of 21430230342 is 24303203412.

It is a super-2 number, since 2×21430230342² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2543373 + ... + 2551784.

It is an arithmetic number, because the mean of its divisors is an integer number (2682600687).

Almost surely, 2^21430230342 is an apocalyptic number.

21430230342 is an abundant number, since it is smaller than the sum of its proper divisors (21491380650).

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

21430230342 is a wasteful number, since it uses less digits than its factorization.

21430230342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5095863.

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 21430230342 its reverse (24303203412), we get a palindrome (45733433754).

The spelling of 21430230342 in words is "twenty-one billion, four hundred thirty million, two hundred thirty thousand, three hundred forty-two".