21424554834 has 8 divisors (see below), whose sum is σ = 42849109680. Its totient is φ = 7141518276.

The previous prime is 21424554829. The next prime is 21424554923. The reversal of 21424554834 is 43845542412.

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

21424554834 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1785379564 + ... + 1785379575.

It is an arithmetic number, because the mean of its divisors is an integer number (5356138710).

Almost surely, 2^21424554834 is an apocalyptic number.

21424554834 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21424554834 is a wasteful number, since it uses less digits than its factorization.

21424554834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3570759144.

The product of its digits is 614400, while the sum is 42.

The spelling of 21424554834 in words is "twenty-one billion, four hundred twenty-four million, five hundred fifty-four thousand, eight hundred thirty-four".