21442432430 has 8 divisors (see below), whose sum is σ = 38596378392. Its totient is φ = 8576972968.

The previous prime is 21442432379. The next prime is 21442432447. The reversal of 21442432430 is 3423424412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21442432393 and 21442432402.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1072121612 + ... + 1072121631.

It is an arithmetic number, because the mean of its divisors is an integer number (4824547299).

Almost surely, 2^21442432430 is an apocalyptic number.

21442432430 is a deficient number, since it is larger than the sum of its proper divisors (17153945962).

21442432430 is a wasteful number, since it uses less digits than its factorization.

21442432430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2144243250.

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 21442432430 its reverse (3423424412), we get a palindrome (24865856842).

The spelling of 21442432430 in words is "twenty-one billion, four hundred forty-two million, four hundred thirty-two thousand, four hundred thirty".